double-shell
英['dʌblʃ'el]
美['dʌblʃ'el]
- n.双壳
双语例句
- There is a case of an oysterlike bivalve that evolved a more and more spiraled shell until, just before extinction, the valves could barely open.
这里有个例子，一种牡蛎状双壳类，进化出越来越趋螺旋状的外壳，直到该物种灭绝，其外壳已几乎不能打开。
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