英语词汇“backswimmer”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	backswimmer
释义	backswimmer /bak"swim'euhr/, n. any of numerous predaceous aquatic hemipterous insects, of the family Notonectidae, that swim on their backs, and may inflict a painful bite if handled. Also called boat bug. [1860-65; BACK¹ + SWIMMER]
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