英语词汇“rock swallow”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	rock swallow
释义	rock swallow noun : any of several swallows that nest on rocky crags; especially : a common Eurasiatic bird (Ptyonoprogne rupestris) — called also crag martin, rock martin
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