| 单词 | family notonectidae |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔backswimmer〕Any of various aquatic bugs of the family Notonectidae that swim on their backs by means of broadened, oarlike hind legs.仰泳蝽：一种属于松藻虫科的水生虫类，用它们宽阔的、桨状的后腿在水上仰泳美国传统 |
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