Translation of "Catching" in Chinese

He is slowly catching up.

他在慢慢地赶上去。

We have lots of catching up to do.

我们要紧追。

Take lots of vitamin C to avoid catching cold.

要避免得感冒，多补充点维生素C。

- I'm catching on.
- I understand.
- I get it.
- I see.
- I do understand.

- 我明白了。
- 我明白。
- 原來如此。

- Which train are you catching?
- What train you are going to take?
- Which train are you going to take?

你乘哪辆火车？