我确信一定是你。

I was sure it was you.

youdao

那一定是你的女儿，长的很可爱。

That must have been your daughter. It was so sweet.

youdao

那一定是你的女儿。

That must have been your daughter.

youdao

And they said, "Well, I'm sorry you feel that way, it's incorrect, and you have to take it anyway."

但他们说：“很抱歉你那么像，这是不对滴，你一定要学它“

麻省理工公开课 - 化学原理课程节选

I guess you got a higher score, as you are a Brown student. How did you prepare for the test?

能被布朗大学录取，我猜你的分数一定很高。你是如何准备考试的呢？

被学问的自由所迷住 - SpeakingMax英语口语达人

bug It's not true now. If there is a bug in the program it's there for only one reason.

如果程序中有一个,那一定是有原因的，是你通过例如犯了。

麻省理工公开课 - 计算机科学及编程导论课程节选