clam-shell

clam-shell
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clam-shell (n.)
c. 1500; see clam (n.) + shell (n.). As "hinged iron box or bucket used in dredging," from 1877.
1. The barnacle and the clam are two examples of filter feeders.
藤壶和蛤类是滤过觅食者的两种例子.

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2. It'started off well, but he seemed to clam up towards the end.
刚开始很, 但是最后他似乎有些沉默.

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3. The movie star is a clam about her age.
这影星对她的年龄守口如瓶.

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4. Everybody shuts up like a clam as soon as you mention it.
你一提及此事,大家便都闭口不言.

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5. He is now as happy as a clam.
他现在相当满足.

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