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He is a clam about his business dealing. 他對自己的生意買賣守口如瓶。

They go clamming every weekend in the summer. 他們夏天每個周末都去挖蛤蜊。

The movie star is a clam about her age. 這影星對她的年齡守口如瓶。

Will you clam up! The boss is talking. 請你保持安靜!老板在說話。

He always clam up when we ask him about his family. 我們一問到他的家庭時，他總是閉口不言。

The suspect clam up when lawyer ask about his girlfriend. 當律師問嫌疑犯有關(guān)他女友的事時，他閉口不答。