I believe tomorrow to be a better day.

我坚信(相信)明天会更美好！

youdao

I don't know when my dream will come true. But I believe tomorrow will be better.

我不知道我的梦什么时候才能实现，但我相信明天会更好。

youdao

I believe tomorrow will be better than today — that the world my generation grows into is going to get better, not worse.

我相信明天会比今天更好，我这代人的未来世界会更好，而不是更差。

youdao

And I believe the NAC will review those tomorrow.

WHITEHOUSE: Press Briefing

I, again, don't have tomorrow's schedule in front of me, but I believe that he'll do some of the practicing that you talk about, as well as continuing to write and work through different sections of the speech.

WHITEHOUSE: Press Briefing

Tomorrow is the anniversary, I believe.

WHITEHOUSE: Press Briefing