(as) happy as a clam
1. 非常高兴; 非常满足
He is now as happy as a clam.
他现在相当满足。
clam up
1. 停止讲话; 变为沉默; 保持沉默
The suspect clammed up when lawyers asked about his girlfriend.
当律师问嫌疑犯有关他女友的事时, 他闭口不答。
Will you clam up! The boss is talking.
请你保持安静! 老板在说话。
You should not clam up on him.
你不应该拒绝跟他谈话。
习惯用语as close as a clam1.[美]一毛不拔的， 非常吝啬happy as a clam1.[美口]非常快活， 非常幸福clam up1.拒不开口， 只字不吐特殊用法dipper clam1.长柄蛤hard shell clam1.硬壳蚌； 蛤蜊