n.蛤；沉默寡言的人

vi.保持沉默；挖蚌

Everybody shut up like a clam as soon as you mention it. 你一提及此事，大家便都閉口不言

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

It started off well, but he seemed to clam up towards the end. 剛開始很，但是最后他似乎有些沉默。

I used to clam up when the talk turned to politics or economics 當話題轉到政治或經(jīng)濟問題時，我常沉默不語。

n.蛤殼；蛤殼式挖泥機