Think of this as the brain.把这个看作是大脑

think of想到；考虑；想象；设想；打算；认为

It was sweet and thoughtful of you to think of it.

你们真好，为我想得那么周到。

What do you think of my new car?

你觉得我的新车怎么样？

When you're becoming aroused, your brain switches on.当你性唤起时大脑就会激活

switch on(用开关)开启

The video is programmed to switch on at ten o'clock.

电视机设定在10点钟自动打开。

Just put the plug in the socket and switch on the machine.

只需将插头插入插座并开动机器就行了。

and then added UK 92480 to the tissue bath.随后将UK92480加入组织浴槽中

add to增加

I have nothing to add to my earlier statement.

我对我先前说的话，没有什么补充的。

I didn't want to add to Mother's misery.

我不愿意增加母亲的痛苦。