有一件事情是肯定的，那就是你们要比我冷静多了。

One thing '; s for sure, you are cooler than me.

youdao

我不知道，但是有一件事情是肯定的：这个人一定很痛苦。

I didn't know, but one thing was certain: this person was suffering.

youdao

他说：“有一件事情是肯定的。”我们处在富有挑战性的时期。

"One thing is for certain - we are in challenging times," he said.

youdao

他说：“有一件事情是肯定的。”我们处在富有挑战性的时期。

"One thing is for certain - we are in challenging times," he said.

youdao