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the first generation
相关语句
  第一代
     The relationship between the amount of eggs (Y 1), the first generation larvae (Y 2) and the first generation moths (x) could be described as Y 1= -315.9 +1.7783x (n=6,r=0.8562 *); Y 2=31.3+0.134x (n=6,r=0.8652 *).
     在大豆上的卵量(Y1)和幼虫量 (Y2 )与第一代蛾量 (x)密切相关 ,其关系式为 :Y1=- 315 .9+1.7783x (n =6 ,r =0 .85 6 2 ) ,Y2 =31.3+0 .134x (n =6 ,r=0 .86 5 2 )。
短句来源
     The mathematical models are as follows: codling moth of winter generation Nt=0.02669 · t3.07095·e-0.26881t,the first generation codling moth Nt=5.27497×10-7·t6.70833·e-0.24771t.
     构建了苹果蠹蛾的数学消长模型:越冬代Nt=0.02669.t3.07095.e-0.26881t; 第一代Nt=5.27497×10-7.t6.70833.e-0.24771t。
短句来源
     The microstructure and stability of a conventional cast equiaxed nickel base superalloy, Ni-1.5Cr-10Co-16W-2Mo-6Al-1Ti-1Nb-0.1C-0.02B-0.1Zr, which possesses a high temperature strength corresponding to that of the first generation single crystal superalloy, were described in this paper.
     研究了一种具有第一代单晶合金高温强度水平,其成分为Ni 1.5Cr 10Co 16W 2Mo 6Al 1Ti 1Nb 0.1C 0.02B 0.1Zr的普通铸造镍基高温合金的显微组织及其长时组织稳定性。
短句来源
     The survival rate,average fecundity,net reproductive rate(Ro),intrinsic increase rate(rm) and finite increase rate(λ) of the first generation were 53.21%,276.28,74.383 6,0.139 1 and 1.149 2 respectively,and those of the second generation were decreased by 21.01%,17.39% ,33.40%,24.16% and 3.30%,respectively.
     第一代世代存活率为53 21%、单雌平均产卵量276 28粒、世代净增长率为74 3836、内禀增长率为0 1391、周限增长率为1 1492,第二代比第一代分别降低了21 01%、17 39%、33 40%、24 16%和3 30%;
短句来源
     The LC50 for the third-instar and fifth-instar larvae of the first generation are 1.6×105 CPB/ml and 3.3×105 CPB/ml respectively. The LD50 for the third-instar larvae of the same generation is 2.1×103 CPB/Iarva by bioassay.
     对第一代3龄和5龄虫的 LC_(50) 分别为1.6×10~5CPB/ml 和3.3×10~5CPB/ml,对同代3龄虫的 LD_(60)为2.1×10~3CPB/虫。
短句来源
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  第1代
     The annual nutrient retention reached 93 13 kg·hm -2 a -1 , which was higher than that of the first generation.
     第 2代杉木中养分元素的年积累量为 93 13kg·hm- 2 a- 1 ,略高于第 1代杉木林的养分年积累量。
短句来源
     The k-strategy and r-strategy species accounted for 69.32% and 30.68% in the first generation,while 47.83% and 52.17% in the second generation,respectively.
     第1代林的k-对策种和r-对策种分别为69.32%和30.68%,第2代林则分别是47.83%和52.17%,可见连栽使草本植物、地上芽植物和r-对策种的数量增加,木本植物和k-对策种的数量减少.
短句来源
     The first generation of artificial diet C egg hatching rate of 83.30%±2.08% and its fifth generation will bring along a hatching rate of 83.2%±2.38%. The difference is not remarkable.
     饲料C第1代卵的孵化率为83.30%±2.08%与第5代的孵化率为83.2%±2.38%差异不显著;
短句来源
     The plant species number of second generation was reduced by 54.43% in a 667 m~2 plot,and by 50% in 18 sampling plots (each of 4 m~2),and the species richness and Shannon-Wiener index of 6-year second generation forest decreased by 39.39% and 17.76%,respectively,compared with the first generation.
     对18块4 m2样方监测(1998~2003年)结果,第2代林植物多样性比第1代林减少了50%,物种丰富度和Shannon-Wiener指数分别比第1代林减少39.39%和17.76%.
短句来源
     From the heading period to the milk maturation of wheat, the percentage of red M. avenae grew with the change of the field conditions (increasing from 17.55% and 14.70% of the first generation to 29.80% and 42.2% of the second generation respectively).
     在小麦抽穗期到乳熟期红体色麦长管蚜个体比例随着田间条件的改变逐代升高(分别由第1代的17.55%和14.70%增至第2代的29.80%和42.2%)。
短句来源
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  “the first generation”译为未确定词的双语例句
     The medium MS+IBA 0.05 mg/L+BA 1.0 mg/L was effective to induce shooting and suitable for the first generation cultivation;
     培养基MS+BA1.0mg/L+IBA0.05mg/L利于诱导出芽,可用于初代培养;
短句来源
     The results show that ①MS +BA1.0mg/L+KT1.0 mg/L +IBA0.2mg/L has the best effect in the first generation culture.
     结果表明:①初代培养以MS+BA1郾0mg/L(单位下同)+KT1郾0+IBA0郾2较好;
短句来源
     The results showed that the mortalities of egg,larva,pupa and adult of this pest in fields were 42.7%,14.5%,4.4% and 12.6% for the first generation,and 32.8%,16.5%,18.9% and 15.6% for the second generation,respectively.
     结果表明:自然条件下,1、2代稻秆潜蝇的卵、幼虫、蛹、成虫死亡率分别为42.7%、14.5%、4.4%、12.6%和32.8%、16.5%、18.9%、15.6%。
短句来源
     the ones of the first generation pupa are 96.9±1.3 day degrees and 12.7℃.
     一代蛹分别为 96 .9± 1.3日度和 12 .7℃。
短句来源
     Using complete diallel crosses, the first generation of 4 combinations, S♂×S♀, E♂×E♀, S♂×E♀and E♂×S♀were obtained from mating and crossing within and between S (Spain) stock and E (England) stock of turbot.
     采用完全双列杂交法对两个大菱鲆养殖群体——西班牙群体(S)和英国群体(E)进行群体间杂交及群体内自繁,得到了S♂×S♀、E♂×E♀、S♂×E♀和E♂×S♀4个组合的子一代。
短句来源
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  the first generation
When the spider mites were transferred from apple to other fruit trees, negative effects on developmental duration, fecundity and life table parameters were found in the first generation, but the effects faded out in succeeding generations.
      
Pupal weight had no effect on fecundity in the first generation but was reflected in the second generation.
      
The implemented Japanese VSOP project (1998-2003) and the Russian Radioastron project (under preparation for space flight) are related to the first generation.
      
The first generation of this mineral with a low Rb/Sr ratio dominates in coarse-grained SFs while the second and third generations with a high Rb/Sr ratio prevail in fine-grained SFs.
      
The Sm-Nd date of the first generation (790±90 Ma) is considered a minimal age of rocks in the northeastern and southwestern regions of the East European Platform that served as a source of sedimentary material of the Lower Cambrian blue clay.
      
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The injurious insects of cotton of this province, however, have not hithertobeen carefully studied, especially the pink bollworm, which annually reducesthe cotton production by 10 to 30 per cent. The present authors spent twoyears in observing the life history and habits of this insect, in attempting tofind some effective control measures. The result is herewith summarized :- 1. In the vicinity of Wu-chang, the pink bollworm has three generationsa year. The first generation occupies May and July. The second...

The injurious insects of cotton of this province, however, have not hithertobeen carefully studied, especially the pink bollworm, which annually reducesthe cotton production by 10 to 30 per cent. The present authors spent twoyears in observing the life history and habits of this insect, in attempting tofind some effective control measures. The result is herewith summarized :- 1. In the vicinity of Wu-chang, the pink bollworm has three generationsa year. The first generation occupies May and July. The second one occursin mid-July and the last in late-August. Due to the lower temperature, theemergence of the first generation need about two months. 2. In day time, the adult is usually inactive, while in windless night,after seven o'clock, it becomes very active and lays eggs mostly on green bollsand calyx. about a week later, the eggs hatch and the newly-hatched larvaeare shortly getting into the bolls. After four days they often eat into theseeds. Ten days later, the lint is so stunted as to become dusky yellow incolor, thus both the yield and the quality of cotton are greatly lowered. Themature larvae appear about half a month after. 3. Field experiments have shown that three dustings of 10% DDT- sulfurpowder were very effective. In the severely damaged cotton area, the thirdspray may be simultaneously done with controlling the cotton leaf-hoppers andthe cotton leaf-rollers. 4. About 84% hibernating larvae in cotton seeds will come out when thecotton exposed in sun light and stored in the farmer's house. Hence it seemsadvisable to put cloth or other soft material covers on the cotton stored inorder to collect and kill the larvae under them. In addition, destruction of allremaining bolls on the cotton stalks, as early as possible in winter is important. 5. For controlling the bollworms in cotton store-houses, the followingresults have been obtained 50% wettable DDT diluted with 20 parts of water,91% of larvae were killed within 30 days; 6.5% 666 (benzene hexachloride)gave a mortality of 63% in four months. Wettable 6.5% 666 diluted withwater (1:100), has been proved to be the most effective ovicide which destroys99.4% of eggs while parathion (E605) also gave a very high mortality at97.7%. But 50% wettable DDT (1:100) Kills eggs at 64.2% and lead arsena-te only 16.2% respectively. 6. There were 39.1% overwintering larvae parasitized by parasitic mitesand wasps. Among them, most are the mite, Pediculoides ventricosus Newport,while the parasitic wasps Eurypterna arakawae Mats. less than 0.5%.

红铃虫在南方棉区为害棉花相当严重,除去脱落蕾铃外,僵黄花率为10—30%,我们针对这个严重问题,进行了红铃虫生活史的观察研究与防治方法试验,写出初步结果,提供防治参考。 1.红铃虫在华中武昌棉区一年有三代。第一代羽化在5至6月,7月中旬为第二代;8月下旬为第三代;第一代的蛹和幼虫所需时期均较第二、三代长。 2.成虫白天不活动,夜晚7时以后无风天气活跃最盛,产卵以在青铃上及花萼上为最多。孵化后三十多分钟即钻入棉桃内为害,4天即侵入棉籽内取食,10天棉瓤纤维呈僵黄状,半月后幼虫即可老熟(第三代的)。 3.田间防治红铃虫以10%滴滴涕硫磺粉喷三次效果显著,在后期棉虫严重地区可结合防治叶跳虫卷叶虫等同时进行。 4.籽花内的幼虫在群众家里及晒花时逃出84%,因此指导群众将籽花堆上加覆盖物,再结合帘架晒花是消减过冬红铃虫最经济有效的办法。 4.防治仓库越冬红铃虫以50%可混性滴滴涕1:30倍水溶液杀虫效果最佳。30天内死亡率达91%.6.5%可混性666(1:20)死亡率为63%。但是1:100倍的水溶液杀卵效率高到99.4%。稀释万分之一的E605为97.7%。50%可混性滴滴涕1:100杀卵率为64.2%,砒酸铃最差...

红铃虫在南方棉区为害棉花相当严重,除去脱落蕾铃外,僵黄花率为10—30%,我们针对这个严重问题,进行了红铃虫生活史的观察研究与防治方法试验,写出初步结果,提供防治参考。 1.红铃虫在华中武昌棉区一年有三代。第一代羽化在5至6月,7月中旬为第二代;8月下旬为第三代;第一代的蛹和幼虫所需时期均较第二、三代长。 2.成虫白天不活动,夜晚7时以后无风天气活跃最盛,产卵以在青铃上及花萼上为最多。孵化后三十多分钟即钻入棉桃内为害,4天即侵入棉籽内取食,10天棉瓤纤维呈僵黄状,半月后幼虫即可老熟(第三代的)。 3.田间防治红铃虫以10%滴滴涕硫磺粉喷三次效果显著,在后期棉虫严重地区可结合防治叶跳虫卷叶虫等同时进行。 4.籽花内的幼虫在群众家里及晒花时逃出84%,因此指导群众将籽花堆上加覆盖物,再结合帘架晒花是消减过冬红铃虫最经济有效的办法。 4.防治仓库越冬红铃虫以50%可混性滴滴涕1:30倍水溶液杀虫效果最佳。30天内死亡率达91%.6.5%可混性666(1:20)死亡率为63%。但是1:100倍的水溶液杀卵效率高到99.4%。稀释万分之一的E605为97.7%。50%可混性滴滴涕1:100杀卵率为64.2%,砒酸铃最差为16.2%。 6.越冬幼虫被寄生的平均有39.1%,发现天敌有二种,其中绝大多数是榖痒螨(Pediculoides ventricosus

The rice stem borer, Chilo Simplex Butler causes great damage to therice crop in the medium semi-glutinous rice region, long water rice region,and late semi-glutinous rice region in Kiangsu. Rice stem borer has two generations a year. The first generation is mostabundant between mid-and late July. The second generation is most abundantin mid-late August. In 1952 and 1953, the borer had had reached and suchabundance cave in the middle of September, that a third incomplete generationseemed probable....

The rice stem borer, Chilo Simplex Butler causes great damage to therice crop in the medium semi-glutinous rice region, long water rice region,and late semi-glutinous rice region in Kiangsu. Rice stem borer has two generations a year. The first generation is mostabundant between mid-and late July. The second generation is most abundantin mid-late August. In 1952 and 1953, the borer had had reached and suchabundance cave in the middle of September, that a third incomplete generationseemed probable. Experimental result shows that late sowing and late transplanting of riceminimized borer damage.

(一)二化螟在江苏省中粳区、沤田区及晚粳区为害严重,大部分枯心苗均为其造成。白穗中幼虫数目相当高,最多一株有137头。 (二)二化螟的发蛾期,一般来讲,第一代盛发期约在6月中、下旬。第二代盛发期约在8月中、下旬。根据观察记载资料,望亭一带,1952年、1953年均在9月中、下旬又起高峰,可能有不完全第三代的出现。 (三)试验记录中指出,人为的移栽对蚁螟的生存,有抑制作用。在栽培制度上,应控制第一代蛾螟卵盛孵期,在秧田内进行。以期达到水稻少受二化螟的为害。 (四)水稻受二化螟为害后,除造成枯心苗白穗外,并造成有虫株。其百分率最高占14.5%。有虫株穗与健穗,穗重相差0.46克。千粒重最高相差3.09克。 (五)在稻根稻草中,二化螟越冬比例,稻根为43.41%,稻草为56.59%。 (六)在不同播种期;移栽期各处理间,受二化螟为害,差异显著。望亭一带适宜播种期、移植期,以5月25日播种,6月28日移栽为最佳。 (七)第一代螟卵之寄生率平均为25.46%。寄生蜂种类有:(1)日本赤眼蜂,(2)稻螟黑卵蜂。 (八)在防治上,除运用行之有效的治螟办法,如秧田捕蛾采卵、点灯诱蛾、剪除枯心苗和白穗、保护寄生蜂、处理稻根外,...

(一)二化螟在江苏省中粳区、沤田区及晚粳区为害严重,大部分枯心苗均为其造成。白穗中幼虫数目相当高,最多一株有137头。 (二)二化螟的发蛾期,一般来讲,第一代盛发期约在6月中、下旬。第二代盛发期约在8月中、下旬。根据观察记载资料,望亭一带,1952年、1953年均在9月中、下旬又起高峰,可能有不完全第三代的出现。 (三)试验记录中指出,人为的移栽对蚁螟的生存,有抑制作用。在栽培制度上,应控制第一代蛾螟卵盛孵期,在秧田内进行。以期达到水稻少受二化螟的为害。 (四)水稻受二化螟为害后,除造成枯心苗白穗外,并造成有虫株。其百分率最高占14.5%。有虫株穗与健穗,穗重相差0.46克。千粒重最高相差3.09克。 (五)在稻根稻草中,二化螟越冬比例,稻根为43.41%,稻草为56.59%。 (六)在不同播种期;移栽期各处理间,受二化螟为害,差异显著。望亭一带适宜播种期、移植期,以5月25日播种,6月28日移栽为最佳。 (七)第一代螟卵之寄生率平均为25.46%。寄生蜂种类有:(1)日本赤眼蜂,(2)稻螟黑卵蜂。 (八)在防治上,除运用行之有效的治螟办法,如秧田捕蛾采卵、点灯诱蛾、剪除枯心苗和白穗、保护寄生蜂、处理稻根外,在栽培制度上,如何利用适宜播种期,减轻或免除二化螟灾害,为今后值得注意的问题。

(1) Euonymus geometer, Abraxas miranda (Butler), is one of the principal garden pests inShanghai, infesting, in particular, Euonymus japonicus Thumb and E. Fortunei Hand-Mazz.,Celastraceae. In China, its distribution includes the provinces of Kiangsu, Chekiang and Kwei-chow as well as some northeastern provinces. (2) Investigations in Shanghai reveal that three generation of euonymus geometer occur inthe course of a year, with the pupa surviving the winter underground. Adults of the first genera-tion start emerging...

(1) Euonymus geometer, Abraxas miranda (Butler), is one of the principal garden pests inShanghai, infesting, in particular, Euonymus japonicus Thumb and E. Fortunei Hand-Mazz.,Celastraceae. In China, its distribution includes the provinces of Kiangsu, Chekiang and Kwei-chow as well as some northeastern provinces. (2) Investigations in Shanghai reveal that three generation of euonymus geometer occur inthe course of a year, with the pupa surviving the winter underground. Adults of the first genera-tion start emerging in the first half of April and the larvae of third generation go undergroundto enter into pupa stage in the middle of November. During this period the larvae infest theleaves of Euonymus japonicus Thumb and E. Fortunei Hand-Mazz. (3) This report deals with the life cycle and habits of this pest. It also includes data rela-tive to the horizontal and vertical distribution densities of its winter pupa. The horizontal dis-tribution density is highest in places just under the plant-stems, reaching 37.8-53.3%, while inplaces about 1 ft beyond the stems, no pupa is to be found. Its vertical distribution density ishighest in places 2 mm from the ground surface, ranging from 37.5% to 45.1%, while below5 mm no pupa has been found. (4) Chemical control experiments have been carried out in the laboratories. The results ofthese experiments show: (a) 10% DDT powder is fully capable of exterminating larvae of all stages; (b) 5% DDT powder registers 95% mortality when treated against olders larvae; (c) 1/1000 dipterex solution registers 97.5% mortality when treated against the larvae of laterstages; (d) 1/2500 dipterex solution registers 100% mortality when treated against larvae of 2-3stages; 78.4% against larvae of later stages; (e) 1/150, 1/200 and 1/300 solution of lead arsenate effects only low mortality. On the basis of the data on the horizontal and versical distribution densities of the over-wintering pupa as reported here, it is recommended that steps should be taken to unearth andesterminate the winter pupa in combination with the anti-four-pests campaign in the winter. Inview of the poor flying ability of the adult, it is also recommended that survey should be madeto ascertain the growth data of the adults of the first generation and exterminate them whenthey start emerging. The survey should be made on basis of past records and the weather condi-tion of the current year.

一、大叶黄杨尺蠖(Abraxas miranda Butler)是重要的园林害虫之一,为害卫矛科的两种植物,即:大叶黄杨与爬行卫矛。在中国分布于江苏、浙江、贵州及东北等地。 二、大叶黄杨尺蠖在上海一年发生三代,但在室内饲育可完成四代,以蛹在土中越冬。第一代成虫自4月上旬开始羽化,幼虫自4月下旬开始为害,至5月下旬进入蛹期。第二代成虫自6月上旬开始羽化,幼虫自6月中旬开始为害、直至8月下旬进入蛹期。第三代成虫自8月中旬开始羽化、幼虫自9月上旬开始至11月中旬进入蛹期。 三、根据室内饲养,成虫的寿命第一代雄虫平均7.8天,雌虫平均9.6天;第二代雄虫平均11天,雌虫平均15.4天;第三代雄虫平均9天,雌虫平均10天;第四代雄虫平均12天,雌虫平均14.5天。卵期第一代为14.5天,第二代8.6天,第三代9天,第四代12天。幼虫期第一代平均34.9天,第二代平均23.4天,第三代平均25天,第四代平均58天。蛹期第一代平均11.4天,第二代平均45.8天,第三代平均15.9天,第四代为越冬蛹。 四、成虫飞行力很弱,白天栖息在大叶黄杨树下或附近草丛中,晚上活动,趋光性不强。成虫羽化多在下午3—5时,羽化后即可交尾,一...

一、大叶黄杨尺蠖(Abraxas miranda Butler)是重要的园林害虫之一,为害卫矛科的两种植物,即:大叶黄杨与爬行卫矛。在中国分布于江苏、浙江、贵州及东北等地。 二、大叶黄杨尺蠖在上海一年发生三代,但在室内饲育可完成四代,以蛹在土中越冬。第一代成虫自4月上旬开始羽化,幼虫自4月下旬开始为害,至5月下旬进入蛹期。第二代成虫自6月上旬开始羽化,幼虫自6月中旬开始为害、直至8月下旬进入蛹期。第三代成虫自8月中旬开始羽化、幼虫自9月上旬开始至11月中旬进入蛹期。 三、根据室内饲养,成虫的寿命第一代雄虫平均7.8天,雌虫平均9.6天;第二代雄虫平均11天,雌虫平均15.4天;第三代雄虫平均9天,雌虫平均10天;第四代雄虫平均12天,雌虫平均14.5天。卵期第一代为14.5天,第二代8.6天,第三代9天,第四代12天。幼虫期第一代平均34.9天,第二代平均23.4天,第三代平均25天,第四代平均58天。蛹期第一代平均11.4天,第二代平均45.8天,第三代平均15.9天,第四代为越冬蛹。 四、成虫飞行力很弱,白天栖息在大叶黄杨树下或附近草丛中,晚上活动,趋光性不强。成虫羽化多在下午3—5时,羽化后即可交尾,一般交尾时间为6—7小时,最长可达11小时,交尾后7小时即行产卵,每一雌蛾可产卵360余粒。 五、幼虫共五龄,羽化后3、4小时就开始取食,受?

 
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