它们是害虫。
The pests spread quickly in these regions.
虫害在这些地区迅速蔓延。
They also check for diseases or pests once a week.
也会进行每周一次的疾病或害虫检查。
Ginkgoes also stand up well to smog, road salt and pests.
银杏树也很经得住烟雾、铺路盐、害虫等的侵袭。
They are particularly vulnerable to pests, disease and climate change.
它们特别容易受到害虫、疾病和气候变化的危害。
Flies and mosquitoes are pests.
苍蝇和蚊子都是害虫。
Flies and mosquitoes are pests.
苍蝇和蚊子是害虫。
There are many pests in the tree.
有许多害虫在树上。
Swallow can help peasants kill pests.
燕子能帮助农民消灭害虫。
Why not choose to eat the pests first?
选择吃虫子有什么不好的呢？
They use ultraviolet lamp to kill pests.
他们使用紫外线灯杀死害虫。
Moles also eat many lawn and garden pests.
鼹鼠还可以吃掉很多草坪和花园里的害虫。
The potato is vulnerable to several pests.
马铃薯易受几种害虫的侵害。
He sprayed the garden to get rid of pests.
他给花园喷了杀虫剂。
These pests are very difficult to eradicate.
这些害虫，除治起来很困难。
苍蝇是害虫！
Cats can help rid the home of unwanted pests.
猫能帮忙清除家里讨厌的老鼠。
Cats can help rid the home of unwanted pests.
猫能帮忙清除家里讨人厌的害虫和有害的小动物。
So, it is of great significance to study these pests.
因此，开展该类害虫的研究具有重要意义。
Daniel: Oh, then what would happen if there were pests?
丹尼尔：哦，那要是有害虫怎么办呢？
Benjamin: I heard they used ultraviolet lamp to kill pests.
本杰明：我听说他们用一种紫外线探照灯来杀灭害虫。
If you can get your spiders and beetles to eat all your pests, then great.
假如蜘蛛和甲虫能够帮你解决所有害虫，那很好。
Fire can affect the host and life condition of forest pests directly.
火烧直接影响森林昆虫的寄主和生存条件。
The invention also provides a method for control of general household pests.
还提供了一种控制常见家庭害虫的方法。
Repellent effect is a way to harmonize the relationship between pests and environment.
驱避是调整有害生物种群和环境之间关系的一种手段。
Prevent and kill pests to create a good environment for maizes growth and development;
防虫治虫，为玉米创造良好生育环境；
The identification of the agricultural pests in this system is more exact and effective.
系统对农业害虫种类的鉴别是准确的、有效的。
The identification of the agricultural pests in this system is more exact and effective.
系统对农业害虫种类的鉴别是准确的、有效的。
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