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seasonal     
相关语句
  季节
     Seasonal structure and variation of the circulation in the southern South China Sea
     南海南部海洋环流的结构与季节变化
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     Seasonal Changes of Rumen Microorganism of the Tibetan Sheep Revealed with Real-Time PCR and PCR-DGGE
     用Real Time PCR和DGGE技术研究放牧藏系绵羊瘤胃微生物季节动态
短句来源
     OBSERVATIONS ON THE SEASONAL CHANGES IN THE HISTOLOGICAL STRUCTURE OF THE SKIN OF THE GIANT TOAD (BUFO BUFO GARGARIZANS CANTOR)
     大蟾蜍(Bufo bufo gargarizans Cantor)皮肤在不同季节中的组织学观察
短句来源
     Observations on the seasonal Change of Gonad and Sex-Reversal in Mytilus samragdinus Chemnitz
     翡翠贻贝(Mytilus smaragdinus Chemnitz)生殖腺的季节变化及性变现象的初步观察
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     A PRELIMINARY STUDY ON THE SEASONAL VARIATION OF LOW-LATITUDE CIRCULATIONS ON 100MB LEVEL
     100毫巴低纬度环流季节变化的初步分析
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  季节性
     Community Aloft and Radar Observations of Seasonal Migration of Insects in Northern China
     华北地区空中昆虫群落及昆虫季节性迁移的雷达观测
短句来源
     The Biology of the Seasonal Reproduction of Chinese Skinks (Eumeces Chinensis)
     中国石龙子(Eumeces chinensis)季节性繁殖生物学研究
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     Research on the Irrigation Management Institutionof Seasonal Shortage of Water in South Irrigation District
     南方季节性缺水灌区管理制度研究
短句来源
     Chemical Composition of Marine AlgaeⅡ. Seasonal Variation
     海藻的化学成分——Ⅱ.舟山地区Sargassum fusiforme,Sargassum thunbergii化学成分的季节性变化
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     Utilization of Seasonal Power and Determination of Installed Capacity for Hydropower Station
     水电站季节性电能的利用与装机容量选择
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     The daily and seasonal average water potential were (-2.86±0.75)MPa and (-2.72±0.14)MPa, respectively.
     试验结果表明:胡杨叶水势日变化均值为(-2.86±0.75)MPa,变化均值为(-2.72±0.14)MPa。
短句来源
     The content of testoserone like immunoactive substance in rumen bacteria averaged 263.5±129.0 fmol/mg , whereas no significance of seasonal difference was found (298.2±158.7 vs 339.5±213.0 fmol/mg, P >0.05 ).
     瘤胃细菌菌体内睾酮样免疫活性物质为263.5±129.0fmol/mg,春夏两之间无明显的节性变化(298.2±158.7vs339.5±213.0fmol/mg,P>0.05)。
短句来源
     In the precipitation chemistry database obtained during the 1992-1993 period, monthly and seasonal statistics of SO42-, NO3-, Ca2+ , NH4+ concentrations, monthly and seasonal wet deposition of H+ , SO42- , NO3- , Ca2+ , NH4+ , monthly and seasonal SO2, NO2 concentrations and monthly and seasonal dry deposition of SO2, NO2 are compiled.
     20世纪90年代已获得的降水化学资料包括SO42-、NO3-、Ca2+、NH4+月、变化,以及H+、SO42-、NO3-、Ca2+、NH4+月、湿沉降量特征和酸性气体SO2、NO2月、变化和干沉降特点等。
短句来源
     2) There were seasonal variations in CH_4 and N_2O for the two forest soils.
     2)两种森林土壤排放CH_4、N_2O通量都存在节变化,干土壤吸收CH_4通量大于雨,干土壤释放N_2O通量小于雨
短句来源
     The seasonal AGR changes of switchgrass at each habitat were double-apex curves. Maximum AGR of standing and total biomass were 158.93 and 169.83 kg/(hm~2·d) for lowland 27.31 and 38.25 kg/(hm~2·d) for terrace, and 37.0 and 36.69 kg/(hm~2·d) for slope land.
     柳枝稷的绝对生长速率(AGR)在整个生长内呈双峰曲线变化,川地柳枝稷草地的现存量和总量AGR最大值分别为158.93和169.83kg/(hm2·d),梯田分别为27.31和38.25kg/(hm2·d),坡地为37.0和36.69kg/(hm2·d)。
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  季节性的
     Temporal pattern of litter inputs are clearly seasonal:75% of the annual litterfall occurred in autumn (September to November),6 2% in spring(March to May),13 6% in summer (June to August),and 5 5% in winter (December to February) .
     凋落物的输入明显存在季节性的时间格局。 凋落物在秋季的产量占全年产量的 75 % ,春季占 6 .2 % ,夏季占 13.6 % ,冬季为 5 .5 %。
短句来源
     Soil NH\++\-4 N, NO\+-\-3 N and mineral N show a normal seasonal change with highest concentrations in August and lowest in April and October.
     土壤NH+4  N、NO-3  N和矿质N表现为明显的季节性的单峰变化;
短句来源
     Based upon ten coastal profiles in 1983、1996 and 1997 in the Caofeidian area along the northwest coast of the Bohai Sea, the quantity and the annual/seasonal rate of erosion and accumulation are estimated, and the trend of coastal evolution and the factors which play an important role in modeling the coastal morphologies are also discussed.
     依据曹妃甸地区1983、1996、1997三个年份10条海岸剖面资料,估算了该区海岸剖面的年际间与季节间的侵蚀堆积量以及变化速率,分析了海岸剖面的变化规律,认为季节性的风浪作用会造成浅滩的侵蚀,而长期的各种因素综合作用则以水下斜坡受蚀、浅滩堆积、整个海岸剖面缓慢向陆移动为主.
短句来源
     The new improvous lining rigid flexible material of channel liner is suilable for improvous and lining project of small channel in north seasonal frozen earth, northwest collapsible loess, salinized soil and expansive soil area.
     本研究利用近几年研究的新材料和技术,研制出一种集防渗、护砌为一体、刚柔结合的新型渠道防渗护砌材料,适用于北方季节性的冻胀土、西北地区特殊的湿陷性黄土、盐胀土和膨胀土层地区的小型渠道防渗护砌工程。
短句来源
     For the data of seasonal, especially Winter method is unique to get an extensive and applied method in traditional analysis method of the time series.
     对于有季节性的数据,温特(Winter)方法是传统时间序列分析方法中唯一得到广泛应用的方法。
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  seasonal
This paper studied the seasonal characteristics to resist the drought stress of Haloxylon persicum Bge.
      
Seasonal dynamics of the concentrations of N in C.
      
Impact factors on fine root seasonal dynamics in Fraxinus mandshurica plantations
      
Seasonal dynamics of fine roots is critical for understanding the processes of fine root turnover.
      
Seasonal variation of fine root biomass was significant (P >amp;lt; 0.05).
      
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Routine hourly observations of ionospheric characteristics have been taken at Wuchang since August 20. 1946. In this paper a general analysis of the data obtained from September 1946 through December 1947 is attempted. The diurnal and seasonal variations of ionization density and virtual height for all regular layers (E, F-l, F-2) are plotted in diagrams and briefly explained. Deviations from the normally recognized characteristics are discussed in more detail.

本文叙述三十五年九月至三十六年十二月在武昌观测游离层之工作结果,且加以分析、对於E,F_1,F_2各层之游离强度及其视高之日变及季变,均绘图表明,并将偶有与一般公认情形不符者特别指出。末又讨论异常E层之变化,及其与流星之关系。

Coilia mystus (L.) is a small fish of economic importance, belonging to the Family Engraulidae. It occurs abundantly along the coast of Amoy and vicinity. The present investigation was undertaken with the chief object of finding out the compostion of food and its seasonal variation. A total of 612 stomachs were examined; of these, only 22 stomachs were found to be empty. The following are the results of the investigation:(1) Coilia mystus feeds chiefly upon planktonic Crustacea, of which Copepoda is, by...

Coilia mystus (L.) is a small fish of economic importance, belonging to the Family Engraulidae. It occurs abundantly along the coast of Amoy and vicinity. The present investigation was undertaken with the chief object of finding out the compostion of food and its seasonal variation. A total of 612 stomachs were examined; of these, only 22 stomachs were found to be empty. The following are the results of the investigation:(1) Coilia mystus feeds chiefly upon planktonic Crustacea, of which Copepoda is, by far, the most important, constituting no less than 75.9% of total food. Of the 15 species of Copepoda identified, Paracalanus pqrvus, Pseudodiaptomus marinus and Tortanus forcipata are relatively more important than the others. Among other Crustacea, the relative importance of various groups Is of the following order: Decapoda (including Lucifer and Brachyuran larvae) > Mysidae > Euphau-siacea > Amphipoda > Ostracoda > Cumacea > Stomatopoda. Next to Crustacea in the order of importance of food conic Chaetognatha and fish ova, the former being the more important of the two. Judging from the composition of food, Coilia mystus is a plankton-feeder.(2) The composition of food is more or less subject to seasonal variation. The order of numerical importance of various groups* in the four seasons is as follows: SPRING (Mar.-May): Copepoda > fish ova > Decapoda > Amphipoda > Mysidae> Euphausiacea > Cumacea> Stomatopoda, young fish. SUMMER (Junc-Aug.): Copcpoda> fish ova> Decapoda >Mysidae> Amphipoda> Euphausiacea > Cumacea > young fish.AUTUMN (Scpt.-Nov.): Copepoda > Decapoda > Mysidae > Ostracoda > Euphausiacea > Amphipoda > Stomatopoda > young fish.WINTER (Dec.-Feb.): Copepoda > Decapoda > Euphausiacea > Cumacea > fishova > Mysidae > Amphipoda > young fish > Stomatopoda. (3) The composition of food varies with age or length (from the tip of snout to the end of body, exclusive of caudal fin) of fish which appears to he related to the density of gill-rakers. The younger fishes (less than 15 cm. in length) with denser gill-rakers (2.0-2.7 rakers per 1 mm.) feed largely upon smaller crustaceans (Cope-poda); whilst the older fishes (over 15 cm. in length) with sparser gill-rakers (1.4 1.9 rakers per 1 mm.) feed largely upon larger crustaceans (Mysidae, Euphausiacea, Stomatopdda, Decapoda). It shows that increase in the size of fish is associated with increrase in the size of food animals eaten.(4) There exists a fairly close agreement between the composition of food and the composition of plankton in the surrounding waters. During the months of March and November when both fish and plankton were collected at the same time off Hai-Chen near Amoy, Copepoda was found to be the most dominant group in both food and plankton. It shows that the fish fed heavily upon those crustaceans occurring most abundantly in the plankton. In this respect, Coilia mystus exercises no selectivity of food. The writers are of the opinion that abundance and availability rather than selection by the fish determine the species of animal eaten.(5) A comparison of the food of Coilia mystus with that of other Clupeoids in Amoy waters reveals the predominance of Copepoda in the diet of most of these fishes. For the sake of increasing the yield of these economic fishes, it is essential to enhance the production of Copepoda in nature by artificial means such as to fertilize the water with nutrient salts, especially phosphates and nitrates, to increase the production of phytoplankton which will, in turn, lead to the higher production of Copepoda.

1.六丝鲚的食料差不多完全是浮游动物,以甲壳类为主,其中以桡足类为最重要、十足类(包括莹虾)次之,糠虾类,端足类,磷虾类更次之。除甲壳类以外,它还捕食很多毛头类和鱼卵,所以六丝鲚应属蜉食性的鱼类。 2.六丝鲚的食料成份有季节变化,不过不很显著:春夏两季以桡足类为主,鱼卵次之,十足类(包括短尾类幼虫)更次之。秋季以桡足类为主,十足类(包括莹虾和短尾类幼虫)次之,糠虾更次之。冬季以桡足类为主,十足类次之,磷虾类更次之。总的来看,桡足类在四季食料中都占了绝对优势。六丝的次要食料则随季节而异;春夏两季是鱼卵,秋冬两季都是十足类。值得注意的是:糠虾类和介壳类在秋季食料中的比率增加,磷虾类在冬季食料中占相当重要位置。食料的季节变化是和浮游生物的季节变化分不开的。 3.食料种类大小和体长有关:体长在15厘米以上的捕食较大的甲壳类(如磷虾类,口脚类和十足类等),而体长在15厘米以下的则捕食较小的甲壳类(如桡足类)。这和鳃耙密度有关:前者的鳃耙较稀(1毫米长中有1.4—1.9鳃耙)而后者的鳃耙较密(1毫米中有2.0—2.7鳃耙)。 4.食料和浮游生物存在着一定关系;在浮游生物中占优势的种类也同样地在食料中占优势。桡足类便是一个...

1.六丝鲚的食料差不多完全是浮游动物,以甲壳类为主,其中以桡足类为最重要、十足类(包括莹虾)次之,糠虾类,端足类,磷虾类更次之。除甲壳类以外,它还捕食很多毛头类和鱼卵,所以六丝鲚应属蜉食性的鱼类。 2.六丝鲚的食料成份有季节变化,不过不很显著:春夏两季以桡足类为主,鱼卵次之,十足类(包括短尾类幼虫)更次之。秋季以桡足类为主,十足类(包括莹虾和短尾类幼虫)次之,糠虾更次之。冬季以桡足类为主,十足类次之,磷虾类更次之。总的来看,桡足类在四季食料中都占了绝对优势。六丝的次要食料则随季节而异;春夏两季是鱼卵,秋冬两季都是十足类。值得注意的是:糠虾类和介壳类在秋季食料中的比率增加,磷虾类在冬季食料中占相当重要位置。食料的季节变化是和浮游生物的季节变化分不开的。 3.食料种类大小和体长有关:体长在15厘米以上的捕食较大的甲壳类(如磷虾类,口脚类和十足类等),而体长在15厘米以下的则捕食较小的甲壳类(如桡足类)。这和鳃耙密度有关:前者的鳃耙较稀(1毫米长中有1.4—1.9鳃耙)而后者的鳃耙较密(1毫米中有2.0—2.7鳃耙)。 4.食料和浮游生物存在着一定关系;在浮游生物中占优势的种类也同样地在食料中占优势。桡足类便是一个很显著例子。其他甲壳类也有相似情况。可是水母则不然,它在浮游生物中很

Using the micromethod of Farmer and Abt, plasma vitamin C content of 9S boys and girls in a middle school was determined throughout the year 1954 to 1955. A dietary survey was also carried out every month of the year, for calculating the vitamin intake. The results of the present study are as follow:1. When the diet contains ample amount of fresh leafy vegetables in season, a satisfactory plasma vitamin C level can be maintained. When the diet is limited in fresh vegetables, plasma vitamin C readily decreases...

Using the micromethod of Farmer and Abt, plasma vitamin C content of 9S boys and girls in a middle school was determined throughout the year 1954 to 1955. A dietary survey was also carried out every month of the year, for calculating the vitamin intake. The results of the present study are as follow:1. When the diet contains ample amount of fresh leafy vegetables in season, a satisfactory plasma vitamin C level can be maintained. When the diet is limited in fresh vegetables, plasma vitamin C readily decreases in those seasons.2. There is a significant seasonal variation of plasma vitamin C content Highest values are obtained in winter, the maximal content occurring in December. The minimal value is observed in June. This corresponds to the variation in the. level of vitamin C intake in different seasons. There is no significant difference between Autumn and Winter.3. No definite correlation between plasma vitamin C content and the condition of the gums was observed in the present study.4. The plasma vitamin C content of Chinese and English school children observed by some other authors was lower than that obtained in the present investigation. It is believed that the increase plasma vitamin C of the subjects in this study is mainly due to improvement of the living condition of the population and widespread education of the people in the fundamentals of nutritional science in recent years.

此次用Farmer与Abt二氏微量测定血中维生素C的方法,前后测定了99名中学 生在一年四季血中该种维生素的含量,同时又以查账与秤重两种方法计算每人每日食物中维生素C的摄取量,借以观察两者之间的关系。结果发现由于不同食物中所供给维生素C的多寡与血中维生素C的含量有密切的关系。在冬季中,受检者血中维生素C的含量有显著的增加,而夏季则又有显著的降低,但在春秋之间并无显著的差别。再将此次所得的结果与过去国内外其他作者所报告的血中维生素C含量相比,则发现此次所得的结果较高,这可能是由于该校膳食改善的结果。从此次受检者血中维生素C的含量与齿龈健康情况检查的结果,很难看出两者之间有明显的关系。

 
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