We have to do it by sweating.

我们必须通过流汗来完成它。

youdao

Now all we have to do is help ourselves and pray to God.

现在我们要做的是自救和向上帝祈祷。

《柯林斯英汉双解大词典》

We can't simply stand by wringing our hands. We have to do something.

我们不能只站着搓手，我们得做点什么。

《柯林斯英汉双解大词典》

The Spanish soldiers fled. "All we have to do."

VOA: special.2010.07.15

And, if we wanted to try to fit, say, hydrogen, into this scheme that we have, we have to do what?

如果我们想要让他们符合我们的原理比如氢气，我们需要怎样？

麻省理工公开课 - 固态化学导论课程节选

OK, so what we have to do is get back underneath this reaction, and see what the molar quantities are.

我们应该做的是,再回到这个反应，看看摩尔量是多少。

麻省理工公开课 - 固态化学导论课程节选

But over the long term, an all-of-the-above energy strategy means we have to do more.

WHITEHOUSE: Weekly Address: An All-Of-The-Above Approach to American Energy | The White House

This will be the main thing that we have to do to protect us.

NPR: Israel May Sever Israeli, Palestinian Road Links

What we have to do for Dark Souls II is to stick to this consistent stance.

FORBES: No Easy Mode Allowed: An Interview With 'Dark Souls II' Director Yui Tanimura, Plus New Screenshots