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cocoon     
相关语句
  
     ZJH92-1 and ZJH92-2 Cocoon Drying Chambers
     ZJH92-1型、ZJH92-2型烘
短句来源
     While the rates of cocoon formation and adult emergence in control were 27.2%~33.5% and 99.2%~ 100% respectively.
     而对照组中菜蛾绒蜂结率和羽化率分别为27.2%-33.5%与99.2%-100%。
短句来源
     The adu lts' number of Tiphiid wasps increased fr om average 0.23/100nets to 3 .62/100nets in fields in the natural reserve re-gions,the cocoon densit y increased from 0.35/m 2 to 1.46/m 2 ,the numbers of white grubs parasiti zed by Tiphiid wasps also increased si gnificantly,and the white grubs density decreased from 3.74/m 2 to 0.62/m 2 .
     保护区内的农田土蜂成虫数量由平均0.23头/100网升至3.62头/100网,土蜂数量由0.35粒/m2升至1.46粒/m2,土蜂对蛴螬的寄生率也有显著提高,蛴螬数量由3.74头/m2降至0.62头/m2。
短句来源
     According to the models, the development threshold temperature for parasitoid egg , larvae, cocoon and one generation were estimated to be 9.206 ℃, 7.766 ℃, 10.196 ℃ and 9.683 ℃, and the thermal constant to be 28.864, 109.245, 89.360, 217.915 day degrees respectively. The optimal development temperature for parasitoid was also calculated to be 34.55 ℃,30.41 ℃,32.33 ℃ and 32.78 ℃ respectively.
     侧沟蜂卵、幼虫、和卵-成虫羽化的发育起点温度分别为9.206℃、7.766℃、10.196℃和9.683℃,有效积温分别为28.864、109.245、89.360、217.915日度,发育速率最快温度分别为34.55℃、30.41℃、32.33℃和32.78℃。
短句来源
     Quanittative Study on Water Composition Influence on Solubility of Cocoon Sericin
     制丝用水的水质组成对层丝胶溶解性影响的定量研究
短句来源
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  蚕茧
     An Insecticide ICW - 98 for Silk and Cocoon Warehouse
     丝绸、蚕茧仓库杀虫剂ICW—98的研制
短句来源
     Theresults show that the unwinding ratio of natural yellow cocoons is much higher and the average valueamounts to 78.66%,the silk yielding reaches 34%~42%, the cocoon layer ratio 21%~24% and theneatness score 92~93.The relative strength of the raw silk is 39.63cN/tex,the extension percentage 21.31%and the initial modulus 42.71cN/dtex.
     结果表明:天然黄色蚕茧的解舒率较高,平均值达到78.66%,出丝率达40%~42%,茧层率21%~24%,净度成绩92~93分。 其生丝的相对强度39.63cN/tex,伸长率21.31%,初始模量42.77cN/dtex。
短句来源
     The causes of declining intensity of yamamai cocoon spectral peak 1530cm~(-1) and the occurrences of the two spectral peaks 1320cm~(-1) and 770cm~(-1) are investigated through experiments of tussah cocoons oxidation.
     用柞蚕茧氧化实验证明了天蚕茧1530cm~(-1)谱峰强度降低的原因和1320cm~(-1)、770cm~(-1)两谱峰的由来,并对后面两个谱峰给予了归属;
短句来源
     Study on the Price of Silkworm Cocoon in Guangxi
     广西蚕茧价格变迁与蚕业生产发展的研究
短句来源
     Forecast and Analysis of Silkworm Cocoon Demand Model
     蚕茧需求模型预测与分析
短句来源
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  茧症
     Clinical analysis of 7-case abdominal cocoon
     腹茧症7例临床分析
短句来源
     Comprehensive analysis of 203 cases with abdominal cocoon
     腹茧症203例综合分析
短句来源
     Clinical analysis of abdominal cocoon in 8 cases
     腹茧症8例临床分析
短句来源
     X-ray Diagnosis of Abdominal Cocoon
     腹茧症的X线诊断
短句来源
     Diagnosis and surgical treatment of abdominal cocoon:a report of 16 cases
     原发性腹茧症16例的诊断与外科治疗
短句来源
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  卵袋
     The number of eggs per cocoon was from 134 to 277. It is estimated that one female can oviposit at most 1260 eggs with a hatching rate of about 70%.
     每个卵袋平均卵数为134粒,最多有277粒。 单雌平均产卵量883粒,最多1,261粒,平均孵化率70%左右。
短句来源
     44 produced 130 yonug average numnber 3 per cocoon (Daping Ⅱ worms). 4、The time earthworms took to reach sexual maturity from hatching came almost the same between the two varieties. Respective half the number of striped worms and Daping II took 30-35 days to mature when kept in food avialable at 19℃-21℃, 60—70% moisture.
     3、每个卵袋所含的幼蚓数不完全相同,间纹蚓平均每个卵袋有幼蚓2.97条,大平蚓平均每个卵袋有幼蚓3条 4、在料温为19℃—21℃,湿度为60—70%时,两个品种蚯蚓都有近半数的幼蚓在30—35天内发育成熟。
短句来源
     Each female can lay as many as 6 egg sacs. Each egg cocoon contains 64 eggs on the average. The average hatching rate of egge is 85%.
     雌蛛一生最多可产6个卵袋,单雌平均产卵量154粒,最多可产466粒,卵的平均孵化率在85%以上.
短句来源
     The favorable temperature ranges from 20—30℃, within which, the preoviposition lasts generally 6 days; the productiveness averages 4 cocoons a female with 25—30 eggs in each cocoon, i. e. an average, their are 100 eggs per female; hatching rate is above 90%;
     最适宜温度范围是在20℃—30℃之间,在最适温度范围内,一般产卵前期为6天左右,平均可产4个卵袋,每个卵袋内平均有卵25—30粒左右,单雌平均产卵量在100粒左右,孵化率在90%以上,成蛛平均寿命为60天左右。
短句来源
     Methods The newly hatched juvenile from same cocoon were bred in 80 cm×60 cm×50 cm aquaria with natural water from rice paddy and weighted every ten days. Water temperature was recorded daily and water was exchanged monthly. Ten chemical elements of water from rice paddy were analyzed in the laboratory.
     方法 在同一个卵袋产下的幼蛭 ,放入盛有天然水的 80 cm× 6 0 cm× 5 0 cm的玻璃缸内饲养 ,每 10 d称牛蛭体重 1次 ,每天记录水温 ,每月换水一次 ,每次在野外采回的水要检测 10种化学成分。
短句来源

 

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  cocoon
Also, they kill the hosts in a concealed but safe position after the hosts cocoon or build their pupal cells.
      
The mean weight gain was 84% of the baseline within 6 weeks, the rate of cocoon deposition was 0.8 per week, and the incubation duration was about 3 weeks, which provided for population doubling within 3 months.
      
A nonlinear negative correlation between the number of juveniles in a cocoon and their weight was found (correlation ratio R= 0.86).
      
The narrow-sense heritability, h2, for batch size was 0.35-0.40; for the number of juveniles in a cocoon, 0.35; for juvenile weight, 0.42.
      
The probability of correlated selection response in traits "number of juveniles in a cocoon" and "weight of juveniles" was estimated.
      
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The willow worm, Actias selene Hubner, belongs to the Saturinudae. The worms live outdoor on trees—most frequently on willows. However, they are perfectly fit to indoor conditions. On account of their strong vitality, the breeding of the worms presents almost no difficulty. Our preliminary breeding of the worms shows that under ordinary conditions and feeding with willow leaves they grow very well. In a better case it only takes 24 days from their larvas to cocoon. They breed three generations in one year,...

The willow worm, Actias selene Hubner, belongs to the Saturinudae. The worms live outdoor on trees—most frequently on willows. However, they are perfectly fit to indoor conditions. On account of their strong vitality, the breeding of the worms presents almost no difficulty. Our preliminary breeding of the worms shows that under ordinary conditions and feeding with willow leaves they grow very well. In a better case it only takes 24 days from their larvas to cocoon. They breed three generations in one year, and their pupas survive in winter. Willow worms are heavier than ordinary domestic silkworms. A well-developed willow worm weighs over 10 grams and is 7-8 cm. in length. With a green colour, its body is scattered with tumors and full of hairs on their tips. The silk of willow worms presents a light-coffee colour and a shining lustre. As compared with that of domestic worms, it is somewhat thicker, while their tensile strength and elongation are nearly similar. Out of one cocoon a silk thread of about 350 meters in length may be obstained. It has the potentiality of being developed into a textile raw-material.

这篇报告是介绍一种野生蚕——柳蚕和柳蚕丝初步试验的情况。柳蚕在上海一带常见,许多地区也有分布。我们为了探求对它的利用,曾把它移放在室内饲养,发现生长良好,饲养方便。从蟻蚕到结茧,快的24天,就能结茧。一年中一般有三个世代,以蛹越冬。蚕身为绿色,体重比家蚕大,成熟的蚕儿有10克多重,身长达7~8公分。身上有瘤状突起,突起顶端长有刚毛。吐丝呈浅咖啡色,具有光泽,强力和延伸与家蚕丝相仿,但比家蚕丝略粗。柳蚕的特点是:生活力强;吃柳树叶(湿叶也无影响);虽系野生,但能在室内饲养;茧子又可以繅出成缕的丝达350公尺,是天然丝的一种资源。因此它可能具有重大的国民经济意义。

This paper discusses four problems about the life history and habitations of the pine-cater-pillar Dendrolimus punctatus Wk. 1. The life history as relations to the climate factor: The caterpillar occures 2--3 genera-tions per year, it means that one part overwintering with second and the others with third ofthe unmatured larvae. The break of each generation nearly coincides to each other in every year,but if the weather is faul in March and April, and the monthly rainfall is higher, the date ofcocoon-spinning...

This paper discusses four problems about the life history and habitations of the pine-cater-pillar Dendrolimus punctatus Wk. 1. The life history as relations to the climate factor: The caterpillar occures 2--3 genera-tions per year, it means that one part overwintering with second and the others with third ofthe unmatured larvae. The break of each generation nearly coincides to each other in every year,but if the weather is faul in March and April, and the monthly rainfall is higher, the date ofcocoon-spinning of the overwintered larvae will be delayed, thus the following generation willalso be delayed. Otherwise, if the weather is fine in March and April, the date of cocoon-spinning will take place quicker awhile. 2. The duration of starvation of the nearly matured larvae as relations to the percentageof emergence, egg-contains in female and to the sexual ratio: The experiment indicates, thatgiving the larvae nearly matured in starvation condition, most of them can oblige to cocoon-spinning. The percentage of the date of emergence of these cocoon is nearly inversely propo-tional with the date of enduring hunger, and the femal individuals will a little increase ascompared with in normal condition, but the egg-contains are decreased regularly as to the dateof enduring in starvation. This experiment indicates, that the nearly matured larvae when confront the lacking of foodplant will still enter to cocoon-spinning. They are also the source of the mass out-break, wemay continue to pay a great attention to them, control them in a proper time. 3. The percentage of emergence, sexual ratio as relations to the out-break of the pine-cater-pillar: According to our work, when the density of the pine-caterpillar increases, the percentageof emergence still contains in a rather larger degree (as in 70% or more), and the sexuel ratioapproaches to 1: 1, That the out-break of this caterpillar may be come sooner. This suppositionwill be confirmed by the further study, but it at least gives us an expectation to anticipate thedate of out-break in a rather simple way. 4. Migration and dispersion of the new-hatched larvae, the nearly matured larvae and thechanging of the larvae in a giving number in the pine tree: According to our observation thatthe method of dispersion of the new-hatched larvae is by the helpness of the wind, the directionof the dispersion is corresponding to the direction of wind, the dimension of the dispersionarea and the percentage of living individuals are relations to the velocity of wind and density oftrees. The migration of the nearly matured larvae is mainly by means of crawling. They havethe habitation of aphototropisism and negative geotropism. As to the changing of the larvae ina giving number in the pine tree. they are much concerned to the wind velocity in hatching,the egg deposition and the density of larvae in these trees.

这篇报告主要讨论了有关松毛虫发生规律的四个问题: 1.松毛虫年生活史和气候因子的关系:累积四年观察的资料,肯定了松毛虫在莲塘一年发生2—3代,即其一部分以第二代中小幼虫,一部分以第三代中小幼虫过冬,各代每个态别的盛发期,基本一致,但如3、4月间温度低,阴雨天长,降雨量多,则能延缓越冬代幼虫的结茧,这样,以后各代,也会顺次略为推延。3—4月温度高,结茧期也会相应略为提早。 越冬二、三代幼虫结茧的迟早问题,在这篇文章中,也讨论到了。由于第二代越冬幼虫在8月中下旬起,食量即大减少,停食期早,次春开始取食日期,又比较晚。第三代越冬幼虫没有这种现象。所以这二种世代在次春的结茧变蛾期,相差不大。在有些情况下,由于晚秋寒冷降临较迟,第三代越冬幼虫取食期延长,甚而还有可能比第二代提早几日结茧。 2.大幼虫耐饥与羽化率,含卵数和性比等的关系:这个项目,是因为看到松毛虫在大发生时,松针被完全吃光,有些幼虫,还能被迫结茧,为欲了解这些虫茧在今后的命运,试验共进行了二年,计二批,所得结果,证明大幼虫在接近结茧时耐饥,多数仍然能被迫结茧,这些虫茧的羽化率高低,与耐饥日期长短,大致上成反比,即结茧距耐饥日期短的,羽化率要高于日期长的。性...

这篇报告主要讨论了有关松毛虫发生规律的四个问题: 1.松毛虫年生活史和气候因子的关系:累积四年观察的资料,肯定了松毛虫在莲塘一年发生2—3代,即其一部分以第二代中小幼虫,一部分以第三代中小幼虫过冬,各代每个态别的盛发期,基本一致,但如3、4月间温度低,阴雨天长,降雨量多,则能延缓越冬代幼虫的结茧,这样,以后各代,也会顺次略为推延。3—4月温度高,结茧期也会相应略为提早。 越冬二、三代幼虫结茧的迟早问题,在这篇文章中,也讨论到了。由于第二代越冬幼虫在8月中下旬起,食量即大减少,停食期早,次春开始取食日期,又比较晚。第三代越冬幼虫没有这种现象。所以这二种世代在次春的结茧变蛾期,相差不大。在有些情况下,由于晚秋寒冷降临较迟,第三代越冬幼虫取食期延长,甚而还有可能比第二代提早几日结茧。 2.大幼虫耐饥与羽化率,含卵数和性比等的关系:这个项目,是因为看到松毛虫在大发生时,松针被完全吃光,有些幼虫,还能被迫结茧,为欲了解这些虫茧在今后的命运,试验共进行了二年,计二批,所得结果,证明大幼虫在接近结茧时耐饥,多数仍然能被迫结茧,这些虫茧的羽化率高低,与耐饥日期长短,大致上成反比,即结茧距耐饥日期短的,羽化率要高于日期长的。性比上,则经耐饥后结茧的,蛾数目似乎要比常态下结茧的多些。?

The codling moth is widely distributed throughout Sinkiang Uighur Autonomous Region, andis considered to be the most destructive fruit pest to the apple and the pear. In order to combatthis fruit borer effectively, investigations on the biology and chemical control of this insect pesthave been conducted in this region since 1956. The present paper gives only the resultsobtained in Ili, the major apple growing district in this region, in 1957 and 1958. 1. The moths have two full, and a partial third generations...

The codling moth is widely distributed throughout Sinkiang Uighur Autonomous Region, andis considered to be the most destructive fruit pest to the apple and the pear. In order to combatthis fruit borer effectively, investigations on the biology and chemical control of this insect pesthave been conducted in this region since 1956. The present paper gives only the resultsobtained in Ili, the major apple growing district in this region, in 1957 and 1958. 1. The moths have two full, and a partial third generations a year. However, about 51.5%of the first brood larvae do not pupate but remain in their cocoons until the following spring.The seasonal lifecycle records together with the spraying schedule are presented in this paper. 2. The emergence climaxes of the overwintering and the first generation of the year 1957were in agreement with that of 1958, and were separated by 48 & 54 days for these years respec-tively. The oviposition climaxes of the first and the second generations in the year 1957 and1958 closely resembled each other, and separated by 46 & 49 days. Again, the hatching climaxesof the first and the second broods occurred almost at the same date in the two successive years,with intervals of 45 & 46 days. All these indicated that in completing one full generation, about45--54 days were required. 3. The preoviposition period of the overwintering generation and that of the first generationwere 3.6 & 4.5 days, and 3.4 & 6.1 days for the two years respectively. The maximum numberof the eggs deposited by a single female of different generations in 1957 and 1958 were 84-125-141,while the average number was 32.6-43 eggs. The longevity of the adult of the overwintering andthe first generation averaged 6.8--10.6 days and 7.6-9.1 days respectively. It is found that thelongevity of the adult could be lengthened by a nectar supply. The longevity of the female isalways longer than that of the male. The sex ratio is 1:1. 4. The first appearance of the egg and the total number of eggs deposited on different varietiesare different. Among the 564 eggs of the first generation found in 1957, 21.9% was found on theearly variety, 25.9% on the median variety, and 52.1% on the late variety. By examining thenumber of infested fruits on different varieties. It is also found that the accumulative percentageof the bored fruit differed with different varieties. In 1957, the first brood larvae infesting theearly, median, and the late varieties were 35%, 41.5% and 55% respectively. These facts reveal thatfor forecasting the first appearance of the egg and the number of infested fruits, proper selecting ofdifferent varieties are of importance. 5. The incubation period of the eggs averaged from 8--9 days in general, and from 5--6days in the hot weather. In the year 1957, the overwintering generations began to lay their eggs at the.begining of May, and these eggs hatched in from 10--21 days, with an average of 15 days;whereas in the year 1958, they started to deposit their eggs in late April, and hatched in from 13--24days, with an average of 19.2 days. So, the first brood larvae of both years hatched in late May.It is extremely important to bear this in mind when arranging the schedule of DDT spray. 6. It has been found that the threshold temperature for the development of the codling mothis 9℃ or 10℃, according to different authors and that approximately 230 day-degrees of effectivetemperature are required to bring about the hatching of the earlist larvae of the first generation.According to our observation and calculation, 9℃ is more suitable as a basists to start with 237.3day-degrees were reached on May 25th, 1957, and 232.9 day-degrees were reached on May 22nd,1958, the calculated dates for these two years coincided nicely with what are actually observed inorchards. This indicates that the method of "Thermal Sums" holds fairly well in forecasting thefirst appearance of the first hatching. 7. According to the date the newly hatched larvae bore into, and the mature larvae come outof the infested fruits, the larval period lasted 25.5--30.2

1.苹果蠹蛾普遍分布于新疆维吾尔自治区各地,历年来受害最重的为苹果、沙果及香梨等。伊犁则为自治区内苹果的主要产地,为此特于1957—1958年在该地作了较全面的观察,该虫一年可发生两个完整世代,和部分第三代,以老熟幼虫越冬。第一代幼虫有滞育现象,滞育率为51.5%。 2.两年来越冬世代及第一代成虫羽化的高峰,第一和第二代产卵的高峰,及第一和第二代幼虫蛀果的高峰,基本上都是一致的。两年中2代成虫羽化高峰相距48—54天,2代产卵高峰相距46—49天,2代幼虫蛀果高峰相距45—46天,三者说明完成一代,大致需时45—54天。 3.两年来观察越冬代及第一代成虫产卵前期之平均,分别为3.6—4.5天,及3.4—6.1天。各代最高产卵量是84—125—141粒,平均32.6—43粒。越冬代及第一代成虫寿命之平均,分别为6.8—10.6天。及7.6—9.1天。寿命之增长与其补充营养有关。雌虫寿命均较雄者为长。雌雄性比例为1:1。 4.成虫在不同品种上产卵的情况。表现有所不同。分析1957年在早、中、晚3品种上 所查得的第一代卵(564粒),各占21.9%、259.9%及52.1%。另外检查不同品种之蛀果率,亦发现同样现象...

1.苹果蠹蛾普遍分布于新疆维吾尔自治区各地,历年来受害最重的为苹果、沙果及香梨等。伊犁则为自治区内苹果的主要产地,为此特于1957—1958年在该地作了较全面的观察,该虫一年可发生两个完整世代,和部分第三代,以老熟幼虫越冬。第一代幼虫有滞育现象,滞育率为51.5%。 2.两年来越冬世代及第一代成虫羽化的高峰,第一和第二代产卵的高峰,及第一和第二代幼虫蛀果的高峰,基本上都是一致的。两年中2代成虫羽化高峰相距48—54天,2代产卵高峰相距46—49天,2代幼虫蛀果高峰相距45—46天,三者说明完成一代,大致需时45—54天。 3.两年来观察越冬代及第一代成虫产卵前期之平均,分别为3.6—4.5天,及3.4—6.1天。各代最高产卵量是84—125—141粒,平均32.6—43粒。越冬代及第一代成虫寿命之平均,分别为6.8—10.6天。及7.6—9.1天。寿命之增长与其补充营养有关。雌虫寿命均较雄者为长。雌雄性比例为1:1。 4.成虫在不同品种上产卵的情况。表现有所不同。分析1957年在早、中、晚3品种上 所查得的第一代卵(564粒),各占21.9%、259.9%及52.1%。另外检查不同品种之蛀果率,亦发现同样现象。1957年第一代幼虫对早、中、晚熟3品种(每一品种各200枚)的累进蛀果率分别为35%、41.5%及55%;至第二代时中熟及晚熟更发展至62.5%?

 
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