1. rub elbows 交际，接触

It’s important for you to go to these parties and rub elbows with everyone. That’s how contacts are made.

参加这些晚会与大家接触接触是很重要的，关系就是这样建立起来的。

2. rub it in 火上浇油

You don’t have to rub it in. I already feel bad enough as it is.

你不要火上浇油了，我已经够难过的。

3. run something by again重复某事务

Can you run that by again? I didn’t quite understand your last point.

请再说一遍好吗？最后一点我听不太懂。

4. say what 你说什么？

Say what? I didn’t hear what you said.

你说什么？我没听到。

5. sit tight耐心等待

Just sit tight. The doctor will be with you in a minute.

耐心等一下，医生马上就来看你。