The point is... 关键是

I know English is important but the point is how to improve.

我知道英语很重要，但关键是如何去提升。

It matters to me！

这对我很重要！

3分钟热度

3-minute passion

例句：

A： I would like to learn piano therefore I will need to buy one。

我想学钢琴，所以我要去买把琴。

B： Oh， I suggest that you think carefully before you buy one as you are always a ‘3-minute passion’ person。

我建议你考虑清楚，因为你总是3分钟热度。

改天吧

Rain check

A：How about a cup of coffee？

去喝杯咖啡？

B：Rain check。

改天吧。

一会儿再聊。

Catch up later.

A：Bob, I am late for the first train, catch you later. 鲍勃，我要错过第一趟火车了，一会再聊。

B：Sure, be careful. 没问题，路上小心。

Like I said 就像我刚才说的

Like I said before, I see failure as a stepping stone to success.

就像我之前说的，失败是成功之母。

都是套路To fall into one‘s trap/setup

Don‘t buy his words。 You will fall into his trap。

别信他的话，都是套路。

别提了。

Don’t get me started.

A：Bob, I heard that you broke with your girlfriend. What’s going on?

鲍勃，我听说你和你的女朋友分手了，怎么回事呀？

B：Don’t get me started. It’s a long story.

别提了，说来话长。