run into和run across

run into:
1. 撞到，例 run into a wall (撞到墙上)
2. 陷入，例 run into trouble (陷入麻烦)
3. 跑进，例 run into the store (跑进商店)
4. 无意中遇见，例 I ran into her at the party. 我是在派对上无意中遇见她的。

run across:
1. 跑着穿过，例 run across the yard (跑着穿过院子)
2. 无意中找到/遇见，语法类似 run into 的用法4。再给个例子：
I ran across her name in the telephone directory.
我无意中在电话簿里看见她的名字。

run into1.快速进入2.陷入3.无意中碰见