| 单词 | water beetle |
| 释义 | water beetle water beetle n.（名词）Any of various aquatic beetles, especially of the family Dytiscidae, having a smooth oval body and flattened and fringed hind legs adapted for swimming.水生甲虫：各种水生甲虫之任一种，尤指龙虱科生有平扁卵圆之身体和适于游泳的扁平带缘毛的后腿 |
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