run into & run across有什么区别?

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。

1.run into sb.
偶然遇见某人 例：I ran into an old schoolfriend at the supermarket this morning.今天早上我在超级市场碰见了一个老同学。
2.run(sth)into sb/sth.
使汽车等撞及某人/某物 例：The bus went out of control and ran into a shop front.那公共汽车失去控制，撞到了一家商店的门脸。
3.run into sth
a.(旅行中）遇到（坏天气）例：We ran into a patch of thick fog just outside Edinburgh.我们就在爱丁堡城外遇到了浓雾。
b.遭遇（困难、问题等） 例：The project is running into financial difficulties.这一项目遇到了财务困难。
c.(不用于被动语态）达到（某一水平或数额）例：Her last novel ran into three reprints in its first year of publication.她最近的一本小说在出版当年就印行了三次。

run across sb/sth
1.偶然遇见某人或发现某事物