他们大规模消灭害虫。
这情形剂可消灭害虫。
在白天，可以通过放置不同的诱饵，引诱不同的害虫上钩，从而达到消灭害虫的目的。
In daytime, by that different baits are laid to lure different injurious insects to rise to the bait, so the goal of killing injurious insects is achieved.
没有了蝙蝠，农民需要更多的杀虫剂来消灭害虫，而这同时也加剧了环境问题和食品价格的上涨。
Without bats, farmers may have to use more insecticide, raising environmental worries and pushing up grocery prices.
这种新杀虫剂消灭了大部分害虫。
他还向水果供应农场引进了蝙蝠，因为蝙蝠可以消灭破坏水果的害虫。
He installed bat houses at suppliers’ farms because bats eat the insects that damage fruit trees.
调查结果显示，编织蚁对于捕获和消灭果蝇以及很多其他的害虫都有非常彻底的效果。
The weaver ants, it turns out, are very thorough about hunting down and eating fruit flies, as well as a host of other pests.
使用杀虫剂消灭这种害虫时，时机的掌握很关键。
吃昆虫的动物通常都有益于人类，因为它们消灭诸如蚊虫之类的害虫。
Usually the insect eaters are helpful to man, because they do away with harmful insects such as mosquitoes.
就连青蛙的幼虫虫- - - - - -蝌蚪也能消灭许多害虫哩！
Even the frogs, tadpoles can destroy the larvae of many of the pests!
农民没有化学药剂就消灭不了植物害虫。
雪像一位斗士，消灭了无数的细菌和害虫。
Thee snow like a fighter, destroyed millions of bacteria and insects.
雪像一位斗士，消灭了无数的细菌和害虫。
Thee snow like a fighter, destroyed millions of bacteria and insects.
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