If you run into any problems, you call me. 如果你碰到可困难，找我。

　　I ran into her on my way home. 回家的路上偶然碰到了她。

　　Good (Nice) running into you. 见到你很高兴。

　　I ran into Mike this morning. 我今天早上碰到麦克了。

　　How's he doing? 他过得怎么样?