我一定可以的！

I know I can do it!

youdao

我的意思是，实际上你可以在一定程度上创造出人们所认为的运气。

I mean, what people regard as luck you can actually create to a degree.

youdao

我觉得她一定不会接受的，不过你可以去问问她。

I don't think for a moment that she'll accept but you can ask her.

《牛津词典》

So, if you want to go at 1:00, you're welcome to do so, but please arrange it with my assistants.

如果你想去上1点的课，也可以，但是一定要和我的助教安排一下。

麻省理工公开课 - 固态化学导论课程节选

and you know, you are pretty smart, I think you will do well.

又聪明的话，我想你一定可以被录取的。

如果是在考虑留学 - SpeakingMax英语口语达人

This was my first glance at plum pudding, and I guess you can see that this must be that positive part -- most of the plums are within that, and you can see all these little raisins or plums in here, that would be that negative charge.

我想你们可以，看到着一定是正电部分,大部分的李子,都在这里面，你们也可以看到,这些小的葡萄干或李子，这就是负电荷。

麻省理工公开课 - 化学原理课程节选