If you don't have the units, then if you say the answer is 19, then we don't know what it means.

如果没有的话,比如你的答案是十九,那我们就不知道这是什么意思

耶鲁公开课 - 基础物理课程节选

So the most basic answer that doesn't explain why is just to say well, the s orbital is lower in energy than the p orbital, but we now have a more complete answer, so we can actually describe why that is.

所以最基本的答案是那没有解释,所以我们事实上可以描述，为什么是那样，但是我们现在有一个更复杂的答案，又是有效电荷量。

麻省理工公开课 - 化学原理课程节选

But notice if it's a tie, that doesn't give us what we were looking for.

不过请注意,如果是平局,这还是没有给出我们想要的答案

耶鲁公开课 - 死亡课程节选

We have not yet found a satisfactory answer to what's the mass of an object?

我们还没有一个令人满意的答案,物体的质量到底是多少

耶鲁公开课 - 基础物理课程节选