I can only do one thing at a time.

我一次只能做一件事。

youdao

I can only do what I think is right.

我只做我认为正确的事情。

youdao

I don't care how long I wait, if I can only do it at last.

我不在乎我要等多长时间，如果我最终能做道的话。

youdao

There was nothing I could do. When you have this kind of a problem, you can only take care of your body.

VOA: special.2010.08.09

Then later on, if I wish, I can establish a canon by saying certain texts have certain significance and those are the texts that I care about and want to read, but I can only do that if I can distinguish between meaning and significance.

而后来，如果我希望，我可以通过说什么来树立一个标准,比如说，一些作品有固定意义,因此我只关心只想读那些作品，但是我只有,能够分清意思和意义之后，才能那样做。

耶鲁公开课 - 文学理论导论课程节选

And yet if a computer can only count up to 2 billion or maybe 4 billion, I mean, what do you then do?

如果一台计算机只能够支持20亿,或者40亿，那我们该怎么办？

哈佛公开课 - 计算机科学课程节选

To have an active cull area in the Forest of Dean I think can only do damage to its reputation.

BBC: Viewpoints: The badger cull

But because I can do it with only my friends I do it.

NEWYORKER: The Face of Facebook

But I don't want people to think that these are the only films I can do, and I don't think my fans would like to see me limited to that.

CNN: The Next Mission