如果你在河里或者湖里游泳，一定要弄清楚水面下有什么。

If you swim in a river or lake, be sure to investigate what is below the water surface.

youdao

我们一定要弄清楚这是否合法。

Let's make sure this is on the level.

youdao

一定要弄清楚何时何地前去面试。

Make sure you know where and when you have to report for the interview.

youdao

但也一定要弄清楚你的情人想要什么。

Be sure to find out what your sweetie wants, too.

youdao

我一定要弄清楚那叫什么。

I must find out what it 's called.

youdao

我一定要尽快弄清楚。

I must know this soon.

youdao

确保；一定要；保证做到；核实；弄清楚。如。

Make sure you turn off all the lights before leaving the lab.

youdao

确保；一定要；保证做到；核实；弄清楚。如。

Make sure you turn off all the lights before leaving the lab.

youdao