1.Burn Out

to become extremely tired or sick by working too hard over a period of time 

耗尽体力；积劳成疾；累垮

情景对话：

W:Sara got so burned out spending so much time volunteering at the hospital.

M:She is really going to need a vacation.

W:Totally.

2.Go With The Flow

to be relaxed and not worry about what you should do 

随大流

情景对话：

W:Should we stop and grab something to eat before we get to the movie theater or do you just want to grab something at the movies? What do you think?

M:I like to go with the flow. Whatever you decide is cool with me

3.be cool with sth

to be happy to accept a situation or suggestion  

不介意；乐意接受

情景对话：

W: What about a barbecue this Saturday?

M: I'm cool with it.

4.Up To You

It means that you want the other person to choose 

由你决定；随便你

情景对话：

W:What do you want for dinner tonight?

M:I'm not sure. What do you want?

W:It's up to you. Whatever you want, we will have.

5.Miss The Point

When you miss the point, it means that you don't understand something

没有抓住要领；抓不到重点

情景对话：

W:Okay. So now you understand?

M:I'm not sure. Can you explain it again? I think i missed the point.

W:Find, I'll explain it one more time.