单词	birdsong
释义	birdsong /ˈbəːdsɒŋ / noun [mass noun] The musical vocalizations of a bird or birds, typically uttered by a male songbird in characteristic bursts or phrases for territorial purposes.The usual explanation for birdsong is that the birds are singing to attract mates or to announce the limits of their territory.... The clear tones of birdsong emerge from internal air sacs that can inflate and deflate, much like a bagpipe's bladder. Ornithologists also know something about how birdsong is produced.
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英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。