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Spatial distribution pattern of larvae of Aleurocanthus spiniferus in citus garden was studied by means of some distribution parameters such as mean crowding, David and Moor's clustering index, index of patchiness, proliferation index, the distribution of negative binomial, Iwao's patchiness, the and Taylor's law. The results showed that the spatial distribution pattern of larvae under all densities appeared to be aggregation distribution, which is characterized by individual attraction and predominant individual group such as cored distribution pattern.

通过运用平均拥挤度m、 David和Moor的丛生指数I、聚块性指数mm、扩散指数C、负二项分布K值等多种聚集度指标和Iwao的m-m回归分析法、Taylor幂法则，研究了沙糖桔园柑桔黑刺粉虱若虫的空间分布格局，结果表明该虫在所有密度下均呈聚集分布，个体间相互吸引，分布的基本成分是个体群。

The cause of aggregation was because of mass oviposition behaviour of adults. Aggregate intensity of larvae in late instars decreased and larvae dispersed gradually.

空间图式的研究，可以揭示种群的空间结构以及种群下结构的状况，无论在理论生态学方面还是应用方面都十分重要 [1 ]。

HPLC was used to investigate whether spinosad applied to parasitized host larvae could reach parasitoid larvae developing inside the hosts.

应用高效液相色谱法检测施用于寄主幼虫的多杀菌素可否传递到在其体内发育的寄生蜂幼虫。

In non-affected B.mori larvae,the parasitoid larvae or eggs were encapsulated and killed by the hemocytes of the hosts.

解剖不受寄生影响的家蚕时，发现寄生蜂很快就被血细胞包囊并杀死。

The results showed that there were two generations in one year, and there were 6~8 instars in duration of larvae's development. Larvae over-winters under bark or in base of tree. Adult were phototaxis and active on night.

结果表明：该虫在吴旗县一年发生2代，以幼虫在粗皮下或树基越冬，幼虫6~8龄，具吐丝下垂习性，在阴坡立木被害重于阳坡，成虫夜间活动，有趋光性。

Research in Hawaii has show that dose s of 1,000 Gy or more may be required to prevent hatch of irradiated eggs, molting of treated larvae to the next instar or pupation of treated mature larvae.

夏威夷的研究表明，阻止辐照过的卵孵化、被处理幼虫蜕皮进入下一龄期或被处理老熟幼虫化蛹，可能需要1000居里或更高的剂量。

Research in Hawaii has show that doses of 1,000 Gy or more may be required to prevent hatch of irradiated eggs, molting of treated larvae to the next instar or pupation of treated mature larvae.

夏威夷的研究表明，阻止辐照过的卵孵化、被处理幼虫蜕皮进入下一龄期或被处理老熟幼虫化蛹，可能需要1000居里或更高的剂量。

To test the toxicity of spore-crystal formulation of HBF-1 specific to larvae of several main scarabaeid species in North China, Bacillus thuringiensis suspensions mixed with sterilized fine soil containing potato pieces were used for feeding the larvae. The LC50 of HBF-1 crystal-spore powder to Popillia quadriguttata, Anomala exoleta, A. mongolica, A.

以我国筛选出的对金龟科幼虫具有杀虫活性的HBF-1菌株为供试菌株，采用菌悬液与含有土豆丝的土壤混合饲喂幼虫的方法，测定了HBF-1菌株孢晶粉剂对华北地区主要金龟子幼虫的毒力，其敏感性依次为四纹丽金龟Popillia quadriguttata，黄褐丽金龟Anomala exoleta，蒙古丽金龟A.mongolica，铜绿丽金龟A.corpulenta和苹毛丽金龟Proagopertha lucidula，LC50为3.104，18.987，30.924，34.713和55.995 μg/g土。

This paper discussed the adaption of trematode larvae to the internal and the external environmental factors of the hosts, according to the life cycle process and the characters of larvae is different developmental phase.

根据吸虫的生活史，结合吸虫各蚴期的特点，分析了各蚴期对自然环境和宿主内环境所产生的适应性变化，从而了解寄生虫和宿主的相互适应。

The development speed of gynogenetic embryos was later than that of the control group, and aneuploids were found in this study. The obvious improved survival of trochophore larvae with a peak at 40s UV exposure suggested the presence of a Hertwig effect in the gynogenesis of A. pectinata. When sperms were irradiated for 40s, the cleavage rate was relatively high (51.2%), the developmental rate of D-larvae became zero, and the rate of haploid reached the highest (36.8%).

经紫外线照射的精子受精后所产生的单倍体胚胎发育速度慢于正常受精所产生的二倍体胚胎，各照射组均出现非整倍体。40s照射组中卵裂率达到51.2%，D型幼虫发生率为0，单倍体率最高，达到36.8%，出现"Hertwig效应"。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。