One way or another.

无论如何。/不管做了什么。

A: It is taking forever to build this new subway.

建设这条新地铁需要很长一段时间。

B: They will complete it,

他们无论如何都会完成的。

What's the occasion?

今天是什么曰子?

A: That's a nice suit. What's the occasion?

衣服真漂亮，今天是什么曰子啊?

B: My best friend is getting married today.

今天我好朋友结婚。