她知道只要打个电话，他就会高高兴兴地照办。

She knew she had only to call and he would come running.

《牛津词典》

只要我知道别人对我的期望是什么，我就能做到。

So long as I know what's expected of me, I can manage.

youdao

只要知道自己有控制力，就足够了。

Just the knowledge that one has control is sufficient.

youdao

And, we knew that if we know the crystal structure we can get the Madelung constant, not a problem.

我们都知道只要有了晶体结构,就能知道马德隆常数。

麻省理工公开课 - 固态化学导论课程节选

So I think if you just know the symbols for the ones that are up there, that would be just dandy.

所以你们只要知道那些元素的简写形式,就很不错了。

麻省理工公开课 - 固态化学导论课程节选

In fact, once you think about it, and not all that long, you can see the answer's got to be no.

事实上,只要你想一想,不用太久,你就会知道答案是否定的

耶鲁公开课 - 死亡课程节选