如果你想早些离开，我相信他会体谅的。

If you want to leave early, I'm sure he'll understand.

《牛津词典》

他答应在六月底完成这项工作，我相信他会履行诺言。

He has promised to finish the job by June and I am sure he will deliver.

《牛津词典》

如果他有时间的话，我相信他会的。

I'm sure he will if he has time.

youdao

If somebody wants to believe something, I say what's the evidence for?

如果有人说他相信什么东西，我一定会问，有什么证据呢？

普林斯顿公开课 - 人性课程节选

I can't rely on Professor Guttag if I give this- if this code to him, I can't rely on him to type in a float. Actually I can, because he's a smart guy, but in general, I can't rely on the user-- I wouldn't do it right to see if you did.

当Guttag使用这段代码的时候-,我不能相信他一定会输入一个浮点数,实际上我能因为他很聪明，但是总体上来讲，别相信用户一定会按照规则来-,我会故意做错来试试你的程序的。

麻省理工公开课 - 计算机科学及编程导论课程节选