如果我们知道赚钱不易，就不会乱花钱。

We will be more careful with money if we know how hard it is to earn money.

youdao

如果我们知道盆地的年龄，我不确定这是否足以成为再次登月的理由。

If we know around how old the Basin is, I'm not sure that's reason enough to go to the Moon again.

youdao

如果我们知道一个老顾客会给不少小费，那么我们就要确保他得到良好的服务。

If we know a regular customer is a good tipper, then we make sure he gets good service.

youdao

Our friend Schr?dinger told us that if you solve for the wave function, this is what the probability densities look like.

我们的朋友薛定谔告诉我们,如果你用波函数来解决，你就会知道这些概率密度看上去的样子。

麻省理工公开课 - 固态化学导论课程节选

For example, if we're talking about a pitcher, like Matsuzaka, we might want to know the speed of his average fastball.

举例来说，如果我们谈到一个投手，就像松阪，我们想知道他投出,快球的平均速度。

麻省理工公开课 - 化学原理课程节选

If I know about the states involved, I just need to know what the volume was in each of them.

我们并不需要知道一条特定过程的路径，如果我们知道所涉及的态,我仅仅需要知道这些态的体积。

麻省理工公开课 - 热力学与动力学课程节选