1、look up

（在参考书、列表等中）查检（事实或信息）

I looked your address up in the personnel file.

我在人事档案里找到了你的地址。

Many people have to look up the meaning of this word in the dictionary.

这个词的意思很多人都要查字典才知道。

拜访，探访，看望（久未见面的人）

I'll try to look him up, ask him a few questions.

我会设法登门拜访，问他几个问题。

She looked up some friends of bygone years.

她去看望了一些过去的老朋友。

改善；好转

Things could be looking up in the computer industry.

计算机行业的情况可能会好转。

2、break into

强行进入；闯入

There was no one nearby who might see him trying to break into the house.

附近没有人可能会看见他试图闯入房子里。

In this country a house is broken into every 24 seconds.

在这个国家每24秒就会有一所房子被人破门而入。

突然开始做（某事）

The moment she was out of sight she broke into a run.

她一走出众人的视线就开始飞奔起来。

Then, breaking into a smile, he said, I brought you something.

然后，他忽然露出笑容，说道：“我给你带了一样东西。”

成功打入，顺利进入

She finally broke into films after an acclaimed stage career.

她在取得舞台生涯的成功后，最终进入电影界发展。