我想成为一名医生，我相信如果我们努力学习，我们都会梦想成真！

I want to be a doctor. I believe our dreams will come true if we study hard!

youdao

我相信如果我足够尽力去做的话，我能做任何事情。

I believe that I can do anything if I try hard enough.

youdao

我相信如果我去一个游客少的城市，这些将会改变。但是现在我住在马拉加。

I'm sure that would change if I would go to a city that was less touristy, but at the moment I really like living in malaga.

youdao

But frankly, I'm convinced, insofar as I'm convinced of anything, that if one doesn't live by that, nothing of any interest is going to happen.

不过，坦率来讲，我相信，或者说，我确信，如果一个人不相信这一点，那么他的艺术创作只会平淡无奇。

普林斯顿公开课 - 人性课程节选

And I'm sure you can imagine that if you want to label onw protein green and one red and one yellow, now you can start looking at really complex biological processes.

我相信你们可以想象如果你,需要把一个蛋白质标记成绿色,一个标记红色，一个标记黄色，这样你就可以研究非常复杂的生物学过程。

麻省理工公开课 - 化学原理课程节选

And I think many parents believe that if they didn't persist in using these things their children would never learn to speak.

我相信很多父母认为,如果他们不坚持使用这些东西,他们的孩子将永远也学不会说话

耶鲁公开课 - 心理学导论课程节选