下决心
我已经决定了。
I've decided.=I've made up my mind.=I've come to a decision.

一切都看你的了。
It's up to you. =It depends on you.
It's completely up to you. =It's all up to you.

你决定吧!
You decide.

这是关键性的一点。
This is the important point.=This is the main point.=This is crucial.

这是我个人的问题。
This is my personal problem.=This is my private affair.

这是生死攸关的大事。
It's a matter of life and death. =It's extremely important.

是去是留，随你。
You're free to go or stay.=You're free to leave anytime.=I'm not keeping you here.

已经无可挽回了。
There's no turning back.=We can't turn back now.

走一步看一步吧!
Let's play it by ear. =Let's leave everything to chance.=Let's just see what happens.

我确信我能做好。
I'm sure I can do it. =I certainly can do it.=I believe I can do it.

我仍然无法决定我该做什么。
I'm still unable to decide what to do.=I still can't decide what to do. =I'm still unsure.

我跟着她。
I'll follow her.=I'll go after her.

我们拧成一股绳地去干。
Let's all get together and act as one.=Let's work together as a team.

反正，也得干。
I have to do it anyhow. =I must do it anyway.

机不可失，时不再来。
It's now or never. =No time like the present. =Seize the day. =Carpe diem.
越早越好。
The sooner, the better.

碰碰运气看。
I'll take a chance.=I'll take a gamble.=I'll go for it. =I'll give it a try.

再拿出点勇气来。
Have more guts!

我们总得想办法完成。
Let's finish it somehow. =Let's try our best to finish it. =Let's get it over with. 

值得一试。
It's worth a try.

我们必须同心同德。
We must function as one mind and one body.=We have to work together.=We must be a team.=We have to cooperate with each other.

你等着瞧吧。
You just wait.

豁出去了。
It's all or nothing.