2、run across无意间碰到。
I ran across her in the public library yesterday.
我昨天在公共图书馆碰见她了。
3、run out 用完，耗尽；(指协议﹑文件等)失效, 过期。
Our food is running out. Will you go to the supermarket to buy some bread?
我们的食物快吃完了,你能到超市买些面包吗?
4、run out of 用完某物。
The aircraft will run out of fuel in another hour.
再过一小时飞机的`燃料就将用完。
5、run over溢出；撞倒并碾过；复习。
The bath is running over — turn the taps off.
浴池的水溢出来了。把水龙头关上。
He ran over a rabbit as he was driving back from a meeting.
他在会后开车回来的路上撞了一只兔子。