I can do it because I believe I can do it.

我能做到，因为我相信我能做到。

youdao

And I believe I can do it.

我相信我一定可以做到。

youdao

I believe I can do better next time.

我相信我下次能做得更好。

youdao

I do not believe we can come to simple conclusions when it comes to the cause and effects of such a complex disorder as autism."

VOA: standard.2010.08.09

Why do I believe in the existence of atoms so small that I can't see them?

为什么我相信原子的存在,它是如此之小,以至于我根本就看不到它们

耶鲁公开课 - 死亡课程节选

But for those of you who raised your hand just tell me I mean why do you think--what makes you believe food can be addictive?

但那些举手的同学,请你们告诉我,你为什么觉得食物会上瘾呢

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And I think with an enthusiastic, inspired Labour Party membership, which I believe I can do, we can achieve that.

BBC: INTERVIEW WITH: PETER HAIN

"I believe we can do it - I've felt it from six months ago, " said Cole.

BBC: World Cup 2010: England spirit delights Capello

"I believe that if I play good I can do anything and I can win again here, " said the Argentine.

BBC: SPORT | Tennis | Federer ready for Masters battle