trim 修剪

I just want a trim. My hair is too long.

我只想修一下。我的头发太长了。

Can you just trim the back ?

可以只修一下后面吗？

I don't want to take too much off.  Just this much. Up to here.

我不想剪太多。就剪这么多吧。可以了

take off 剪掉

You can take off a little more. I'd like it shorter.可以再剪掉一点吗？ 我喜欢短点的。

Just make sure it's not more than two inches.

I like my hair longer.

一定不要超过两英尺啊，我喜欢头发长一些。

Just make sure it's even.一定要对称啊。

Just make sure it's  above my eyes.

一定要在我眼睛上方啊。