the upstroke of the whale's tail.
鲸尾往一扬。
the upstroke of the whale's tail.
鲸尾往一扬。
Spedding and his colleagues think that the unique aerodynamic wake signatures of bat wings are caused by different mechanical operations in the upstroke of the wingbeat.
斯佩丁和他同事们认为,独特气动签字后,蝙蝠翅膀所造成不同机械操,upstrokewingbeat 。
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