封窑门
He is a clam about his business dealing. 他对自己的生意买卖守口如瓶。
They go clamming every weekend in the summer. 他们夏天每个周末都去挖蛤蜊。
The movie star is a clam about her age. 这影星对她的年龄守口如瓶。
Will you clam up! The boss is talking. 请你保持安静!老板在说话。
He always clam up when we ask him about his family. 我们一问到他的家庭时，他总是闭口不言。
The suspect clam up when lawyer ask about his girlfriend. 当律师问嫌疑犯有关他女友的事时，他闭口不答。
