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单词 backswimmer
释义 back·swim·mer AHD[băkʹswĭm'ər] D.J.[ˈbækˌswɪmə]K.K.[ˈbækˌswɪmɚ]n.(名词)
  1. 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
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