杀虫剂的一种

A very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar.

一种极具毒性的金属元素，有三种同素异性体，砷和砷的化合物用作除草剂、杀虫剂和各种合金，见于毒砂、雌黄、雄黄中。

One of the theoretical issues arising from any pesticide is the effect of a killing substance on the target population. Because a target population is a biological entity, and as such, subject to evolutionary and ecological processes, evolutionary ecologists would predict that a substance designed to kill insects would at the same time act as a selection pressure for resistance to the same substance.

理论上，我们需要关注的问题之一是，杀虫剂对目标群体杀伤作用的影响，因为，目标群体属于一个生物体系，同样需要遵从进化和生态学过程，进化生态学家认为，杀虫剂用来杀虫同时，也是一种针对杀虫剂抗性的选择压力。

Of insecticide,with the idea that one of them should eliminate the

有一种设想是使用两种不同类型的混合杀虫剂，其想法是如果害虫对其中之一有抗药性，那么另一种就能杀死它。

Lindane is another type of insecticide although it is a lot stronger than other insecticides and has neurotoxin chemicals so it needs to be used carefully.

林丹是另一种类型的杀虫剂，虽然这是很多比其他杀虫剂，并已神经毒素的化学品，因此需要加以审慎使用。

This work is one of the most important bases of eliminating locusts. Studying the oogenesis of insects has important significance on demonstrating the reproductive mechanism and controlling locusts" fertility. At the same time, it"s an important means of studying the forecast of pests and the law of occurrence. It can reveal the law of ovipositing and explain the physiological basis of pests" occurrence, thus design "biorational insecticide.

研究昆虫的卵子发生对于阐明昆虫的生殖机理和控制繁殖具有重要的实践意义，是研究害虫预测预报和发生规律的一种重要手段，同时可以揭示昆虫大量产卵的规律，阐明害虫大发生的生理基础，从而设计出"生物合理的杀虫剂"，并为促进有益昆虫的大量繁殖提供理论依据。

Photodecomposition of pesticides is one of the most important degradation pathways occurring in natural environment and that has a direct impact on the efficiency and the degradation dynamics of pesticides.

鱼藤酮是一种极具应用前景的植物性杀虫剂，进行该杀虫剂在自然环境条件下的残留降解和光降解研究有着十分重要的意义。

The invention relates to a insecticide prepared from plants, especially to a compound botanical insecticide containing pokeberry.

本发明涉及植物源杀虫剂，尤其是一种含商陆的复方植物杀虫剂。

This work is one of the most important bases of eliminating locusts. Studying the oogenesis of insects has important significance on demonstrating the reproductive mechanism and controlling locusts" fertility. At the same time, it"s an important means of studying the forecast of pests and the law of occurrence. It can reveal the law of ovipositing and explain the physiological basis of pests" occurrence, thus design "biorational insecticide.

研究昆虫的卵子发生对于阐明昆虫的生殖机理和控制繁殖具有重要的实践意义，是研究害虫预测预报和发生规律的一种重要手段，同时可以揭示昆虫大量产卵的规律，阐明害虫大发生的生理基础，从而设计出&生物合理的杀虫剂&，并为促进有益昆虫的大量繁殖提供理论依据。

It could be that one disease, perhaps a new type of lurgy, invites the others to infect the bee, or that a pesticide performs this role.

可能是一种疾病、也许是一种新的疾病，招致其他疾病感染蜜蜂，还可能是某种杀虫剂起了这种作用。

It could be th a t one dise a se, perh a ps a new type of lurgy , invites the others to infect the bee, or th a t a pesticide performs this role.

可能是一种疾病、也许是一种新的疾病，招致其他疾病感染蜜蜂，还可能是某种杀虫剂起了这种作用。

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