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Parasitism almost had no effect on old third or fourth instar larvae,while most parasitized first and early second instar larvae died after they molted to the next instar.

低龄家蚕被寄生后大量死亡，而高龄家蚕几乎不受寄生的影响。

On the basis of the research above, distribution of vibrios isolated from 4 species of cultured shrimp larvae in 5 countries were assayed by Biolog GN system. The isolates were isolated mainly from health or diseased shrimp larvae.

在上述研究基础上，采用BIOLOG-GN细菌鉴定系统，分析了来自5个国家的4个养殖对虾品种苗期及部分养成期虾体的185株弧菌（分别分离自对虾健康状态及发病期间）。

After 0.5 μg/larva propiconazole had been injected into the 4th instar larvae of S. litura for 24 h and 48 h, the reduced rates of blood corpuscle of larvae were 19.67% and 21.38%, and the reduced rates of blood content were 20.42% and 23.87% respectively.

在活体试验中，以0.5μg/头剂量的丙环唑注射斜纹夜蛾4龄幼虫，处理后24 h和48 h，试虫血淋巴中血细胞数分别下降了19.67%、21.38%，血淋巴含量分别下降了20.42%、23.87%。

The larvae on different development stage indicated different sensitivity to reactive oxygen species, the napuli VI showed the most sensitive. 2 Antioxidants could decrease the damage effect of reactive oxygen species on larvae in certain level.The addition of antioxidants in culture system had risen larva suvival rate and the metamorphosis rate of cyprid .

外源抗氧化剂的加入在一定程度上减弱了活性氧对东方小藤壶幼虫的伤害作用，从而提高了幼虫的存活率和变态率；在减弱活性氧对东方小藤壶幼虫的伤害作用中，不同类型的抗氧化剂对不同类型的活性氧所起的作用大小不同。

The trailing roots of Water Hyacinth can provide a habitat for a variety of aquatic invertebrates including gastropods, chironomid larvae, dragonfly and damselfly larvae, various beetles, and heteropteran bugs.

凤眼蓝*/蔓生植物凤眼蓝的根可作为多种水生无脊椎动物的生境，包括腹足类动物、摇蚊科幼虫、蜻蜓和蟌的幼虫、多类甲虫及异翅目昆虫。

Under this scenario, the long-term decline in bivalve mollusc larvae will reflect increased predation on the settled larvae and adults by benthic decapods.

据此软体动物幼体的长期减少反映了深海十足类对其幼体和成体的掠食。

As the raise of ammonia-N concentration,survival rate and daily growth of unexuviated larvae decreased gradually, while the metamorphosis rate and daily growth of exuviated larvae increased gradually firstly and then decreased.

氨氮是虾蟹类的排泄物，也是虾蟹类残饵、粪便以及其它动植物尸体等含氮有机物分解的终产物，硫化氢则是由于含硫有机物在缺氧条件下，由厌氧细菌分解形成。

As the raise of ammonia-N concentration, survival rate and daily growth of unexuviated larvae decreased gradually, while the metamorphosis rate and daily growth of exuviated larvae increased gradually firstly and then decreased. As the raise of sulfureted hydrogen concentration, all the parameters measured decreased gradually.

在本试验浓度范围内，随着氨氮浓度的升高，三疣梭子蟹各期幼体存活率和未变态个体的日生长率都逐渐降低，变态率和变态个体的日生长率则先逐渐升高，达到一个峰值后又逐渐降低；随着硫化氢浓度的升高，三疣梭子蟹各期幼体存活率和日生长率A均呈现逐渐降低趋势，变态率和日生长率B也逐渐减小。

Cantly greater numbers of living larvae were found in sugar maple than in the other tree species; however,more were found in red oak and fewer in green ash than expected,considering relative numbers of oviposition sites. After 90 d,mean mass of living larvae did not differ signi?cantly among tree species.

然而，考虑到产卵点的相关数量，我们在红橡树上发现的活的幼虫的量要比预料的多，而在白蜡树上发现的幼虫的量则没有预料的多。90天后，在这些树种上平均幼虫总量已经没有显著的差异了。

There were many heterobacteria aid vibrios but few Vibrio parahaemolyticus in living bait. The correlation coefficients between larvae and heterobacteria and vibrios in water were 0.704 and 0.840 in culture system respectively, while the correlation among heterobacteria, vibrios in living bait and larvae, oater were weak or negative.

活饵中异养菌和弧菌数量很大，致病性副溶血弧菌量很低养殖体系中幼体与水体中的异养菌和弧菌的相关系数分别为0.704和0.840；活饵中异养菌、弧菌与对虾幼体和养殖水体相关性很低或呈负相关。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷