1、introduce

引进;首次引入;推行

The Government has introduced a number of other money-saving moves.

政府已经采取了其他一些省钱的举措。

I kept the birds indoors all winter and introduced them into an aviary the following June.

整个冬天我把鸟关在室内,然后在接下来的6月份把它们放入鸟类饲养场饲养。

介绍;引荐;使相互认识

Tim, may I introduce you to my uncle's secretary, Mary Waller?

蒂姆,我来介绍一下，这位是我叔叔的秘书玛丽·沃勒。

Someone introduced us and I sat next to him.

有人给我们作了介绍,我挨着他坐下了。

介绍;使了解;使初次接触

He introduced us to the delights of natural food.

他让我们认识到食用天然食物的乐趣。

2、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。