You should use 'officer' to address a policeman.

你应该用 'officer' 来称呼警察。

I'm looking for shampoo and hair conditioner for oily hair.

我在找适合油性头发的洗发水和护发素。

Excuse me, I can't seem to find my seat. Can you help me?

不好意思，我好像找不到我的座位了。您能帮帮我吗？

I have to cram all night for tomorrow's exams.

为了明天的考试，我得熬夜临阵磨枪。

Anybody who drinks too much can be called a boozer.

喝酒太多的人叫酒鬼。

I don't appreciate your advances towards me.

我真的不喜欢你来搭讪。