名词
中文翻译：益虫
同义词：
['beneficial insect', 'beneficial organism']
例句：
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1. These insects are known to be beneficialto the ecosystem.
这些昆虫被认为对生态系统有益。
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2. The ladybug is a commonpest control for farmers.
瓢虫是农民常见的害虫控制方法。
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3. Theant colony is anexample of a beneficial community.
蚁群是一个有益的社区例子。