11.昙花一现
a flash in the pan
12.他对保险业务一窍不通。
He doesnt know beans about insurance business at all.
13.她非常勇敢，但终因寡敌不过众，被那帮人打晕过去。
The girl was brave enough, but as being outnumbered, she was finally knocked into the middle of next week by the gang.
14.他喜欢单枪匹马地去干。
He always likes to play a lone1 hand.
15.他刚开始就出师不利。
He got off on the wrong foot when he started doing it.
16.你还嫩点儿。
Youre still wet behind the ears.
17.她的饭量特别小。
She eats like a bird.
18.那个孩子的嘴特别硬。
That boy never says uncle.
19.大家队占上风。
Our team gained the upper hand.
20.你中圈套了。
You rose to the bait.