例句:Kevin has just passed his driving test.
凯文刚刚通过驾照考试。
2.speed limit 限速
例句:The speed limit is 40 miles an hour. Don't exceed this maximum.
限速每小时四十英里，不要超过这个极限。
3.back off 后退
例句:They backed off in horror.
他们心怀恐惧地退缩了。
4.cried uncle 求饶；投降
例句:Members of the gang held him down until at last he cried uncle.
一帮盗贼强按住他直到最后他喊投降。
