知道什么是

know what's what───心中有数

I know what───我知道吗

know the area───了解该地区

you know what I mean───你知道我的意思吗

grow wheat───种小麦

know best───最了解

know better───有头脑；明事理；不会上当

Red-Cap did not know what a wicked creature he was, and was not at all afraid of him.───小红帽不知道它是一个多么坏的家伙，一点也不怕它。

don't even know what a Mock Turtle is.───假海龟是什么都不知道。

If you know what a molecule is not difficult to understand thermal, gas and the expansion of the principles of the movement of objects.───如果你知道了什么是分子，就不难理解热、气体膨胀以及物体运动的原理了。

It was just a matter of my picking out which old message I was going to use on her so that she would know what a bad girl she had been.───它是外面的我要在她身上使用哪一个旧的信息以便她会知道的确实大约我的采集什么一个坏女孩她是。

If you know what a cylinder looks like, you probably can see that the normal vector sticks straight out of it horizontally.───如果大家知道圆柱面是什么样的，那么就可以想象到，其法向量水平地指向外面。

She did not know what a gold piece was; she had never seen one; she hid it quickly in her pocket, as though she had stolen it.───她不知道金币是什么，她从来不曾见过，她赶忙把它藏在衣袋里，好象是偷来的一样。

Red-cap did not know what a wicked creature he was, and was not at all afraid of him.───小红帽不知道狼是坏家伙，所以一点也不怕它。

Today I'm in high spirits and I'm going to take you for a nice stroll in the forest to let you know what a magic tropical rain forest is.───今天我的心情好，我就带你在森林里好好转转，让你见识见识什么叫神奇美丽的热带雨林。

Lucky the geezer didn't know what a detective sergeant gets paid or he might have got suspicious.

If you want to know what a man's like, take a good look at how he treats his inferiors, not his equals. J. K. Rowling 

Take no notice of him you know what a show - off he is.

Most people know what a great scientist Edison became.

I don't even know what a Ouija board is.

You don't know what a pervert is, I suppose.

You know what a U-boat looks like, boy?

You know what a go-go dance is?

Do you know what a sausage roll is?