1、turn on

打开（设备）；接通（…的供应）

I want to turn on the television.

我想开电视。

She asked them why they hadn't turned the lights on.

她问他们为什么不开灯。

对…进行身体（或语言)攻击;斥责

Demonstrators turned on police, overturning vehicles and setting fire to them.

示威者攻击警察，推翻车辆并将其纵火焚烧。

He turned on Pete and accused him of being mixed up in drugs.

他怒斥皮特，指责他沾染毒品。

依靠;取决于

The plot turns on whether Ilsa will choose her lover or her husband.

故事情节取决于伊尔莎会选择情人还是丈夫。

2、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。