幼体

To understand the effect of heavy metals on Portunus trituberculatus, larvae were exposed to varying concentrations of Cu, Pb, Cd and Hg.

为了解海洋重金属污染对三疣梭子蟹的危害，进行了Cu、Pb、Cd、Hg对三疣梭子蟹幼体影响的试验。

This paper studied the effects of ammonia-N and sulfureted hydrogen on the livability, metamorphosis rate and daily growth of Portunus trituberculatus larvae.

研究了氨氮和硫化氢对三疣梭子蟹各期幼体存活率、变态率和日生长率的影响。

An experiment was conducted to determine the acute toxicity of dipterex (0, 0.008, 0.01, 0.04, 0.07 and 0. 10 mg/L) to crab Portunus trituberculatus larvae.

试验结果表明，随着三疣梭子蟹幼体的发育，其半致死质量浓度以及安全质量浓度呈上升趋势。

A: A single negative stool examination does not exclude a parasitic infection, since the sample may have been collected during the prepatent period (i.e., the time between infection and the production of detectable ova or larvae) or because the target organism may have been shed inconsistently or in low numbers, as is frequently the case with strongyloides larvae.

一次大便虫卵和寄生虫检查的阴性结果不能排除寄生虫感染，因为样本可能在潜伏期还暂时没有异常（如在感染和产生可以检测到的虫卵或幼体前）或者所关注的微生物已经排出，或者数量太少，如类圆线虫属。

Cryptic cryptic coloring predaceous vertebrate tint zebra Sargasso twig lichen flake gradation obliterate larva pupa mimicry nocturnal insectivorous procryptic

脊椎动物门色泽，色彩斑马果本马尾藻嫩枝地衣一片等级，层次，分等涂抹，擦去，使消失幼虫，幼体蛹模仿，拟态夜间发生的，夜出的食虫的有保护色的，保护性的 2。

Cryptic coloring predaceous vertebrate tint zebra Sargasso twig lichen flake gradation obliterate larva pupa mimicry nocturnal insectivorous procryptic

脊椎动物门色泽，色彩斑马果本马尾藻嫩枝地衣一片等级，层次，分等涂抹，擦去，使消失幼虫，幼体蛹模仿，拟态夜间发生的，夜出的食虫的有保护色的，保护性的难句译注 1。

At salinities of 20-35 ppt, eggs required 28 h, 45 h and nearly 4-5 days to develop into protozoea I at 30°C, 25°C and 20°C, respectively.

在盐度2035ppt之间，温度30、 25及20℃孵化所需时间分别为28、45小时及45天，才能变态至蚤状幼体第一期。

In this thesis, the acute lethal toxicity to Rana japonica tadpoles, the short-term phytotoxicity to Cucumis sativus and the population growth inhibition toxicity to Tetrahymena pyriformis of selected substituted phenols with multiple mechanisms of toxic action were compared and interspecies correlation was investigated.

本文比较了具有多种毒性作用机制的取代苯酚对两栖动物幼体的急性致死性毒性、对高等植物生长的抑制毒性以及对原生动物—四膜虫的种群生长抑制毒性，探讨了这一类污染物的毒性作用机制，进行了种间相关性研究。

The results show that the rearing larvae of Penaeus vannamei is related to both the water quantity change and the change of ponds, expecially to the kind and the amount of diets. During the microencapsulated diets used, diets of "OK" brand are better than that of "Bonasse" brand. The diet blended with 80%"OK" brand and 20% rotifera is the best.

主要是与投喂饲料的种类及用量有关：在所使用的微囊饲料中欧开牌饲料比博尚牌饲料的育苗效果好，其中80%欧开牌微胶囊饲料和20%卤虫配合使用培育凡纳对虾幼体的效果又是最佳的。

The nursery water was the best, when microencapsulated diets of "OK" and rotifera were blended at the percentage of 80% and 20%, the nursery water quality was the best during the rearing period, the highest concentration of NH3-Nt (NH3-Nm) was 1.025mg/L (0.0836mg/L),and the highest concentration of NO2-- N was 0.0236mg/L. When larvae emerged, the concentration of COD was 1.526mg/L, Puyrrop Hta was 1000 Entries/ml, and the metamorphic rates of all periods exceeded symmetrically 97%, and the survival rates also higher than the control group fed pure crude diets. The emergence status in P7 period was described as follows: the metamorphic rate: 73.33%; the average tail weight: 2mg; average body length: about 7.604mm; which were 18.30%, 19.3%, 8.4% higher than that of control group respectively.

其中80％欧开牌微胶囊饲料和20％卤虫配合使用的育苗效果最好，在整个育苗期间该实验组水质较好，NH_3-N_t(NH_3-Nm)含量最高为1.025mg／L(0.0836mg／L)，NO_2~--N_2含量最高为0.0236mg／L，出苗时COD为1.526mg／L，甲藻类含量为1000个／ml，幼体各期的变态率较稳定均衡，均大于97％，成活率也高于只投喂天然饵料的对照组，至仔虾第7天(P_7)出苗时，出苗率为73.33％，平均尾重为2mg，平均体长达7.604mm，分别比天然饵料的对照组高出18.30％、19.3％和8.4％，各项出苗指标均明显高于对照组(P＜0.05)；且虾苗活泼健壮、体表洁净、均匀度高。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。