单词	diving beetle
释义	diving beetle noun : any of various predatory aquatic beetles (family Dytiscidae) that breathe while submerged using air trapped under their elytra Example Sentences Recent Examples on the Web Various species of aquatic insects, such as the predaceous diving beetle, use bubbles for breathing underwater. Elizabeth Gamillo, Smithsonian Magazine, 27 May 2021 From horror to hope Scientists have known for a few decades that diving beetles share the waterlogged limestone cavern known as Devil’s Hole with the pupfish. Jason Bittel, National Geographic, 1 Mar. 2019 Word History First Known Use circa 1889, in the meaning defined above
随便看	hardly a hardly any hardly anyone hardly ever hardly than hardly/scarcely than hardmouthed hardness hardnesses hardnose hardnoses hardock hardpack hardpan hardpans hards hardscape hardscrabble hardscrabbler hardscrabblest hardship hardships hardstand hardstanding hardstandings

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