in

prep.在 ... 里；在 ... 地方；在 ... 期间；在 ... 方面；进入...里面；处于...状态；穿着...；以...的方式

adv.在家；入；进；向里；在某地；并入；在某种关系中

adj.在里面的；新来的；执政的；时髦的

n.当权者；影响；达成目标的路径

The telephone was in the little study on the ground floor. 电话在底楼的小房书里。

The books are printed in Hong Kong. 这些书在香港印刷。

They are in research of this new technique. 他们正在研究这种新工艺。

He is a layman in economics. 他对经济学一窍不通。

I invited him in for a drink. 我邀请他进屋喝一杯。

I am sorry that my room is in such a mess. 不好意思,我的房间太乱了。

She looked so beautiful in her wedding dress. 她穿上婚纱看起来真美。

You have to pay in cash. 你得付现金。

We are trying to teach mathematics in a more interesting way. 我们正在努力尝试着用一种有趣的方式来教数学。

We all sat around in a circle. 我们围成一圈坐在一起。

He is not in at the moment. 这个时候他不在家。

He opened the door and stepped in. 他打开门走了进去。

Evan found a photography shop, went in, and talked with the clerk. 艾凡找到一家照相馆,走进去和店员讲话。

She looked in the window and found a baby sleeping on the bed. 她朝窗户里看,发现有个婴儿在床上睡觉。

They are having a heated argument. You'd better not wade in. 他们讨论地很激烈，你最好不要介入。

He got in bad with his roommate. 他与室友相处得不好。

The in part of the machine is very complex.