Yup. So it's just that ionization energy 94×10-18J that we have experimentally measured, 3 . 9 4 times 10 to the negative 18 joules.

它就是我们通过实验测得的,电离能3。,我们用所有的这些。

麻省理工公开课 - 化学原理课程节选

But we know this, in particular, from a series of studies that would be unethical if they were to be done today.

我们知道这点，是通过一系列的实验，出于人道精神,这些实验现在就不能做了。

耶鲁公开课 - 心理学导论课程节选

We know how you got that from an earlier experiment.

我们通过之前的实验知道了这些

耶鲁公开课 - 基础物理课程节选

I've got to find them by experimenting, by putting other bodies and seeing how they react and then finding out what's the force that acts on a body when it's placed in this or that situation.

我得通过实验找出这些力,我会增加其它物体,观察其反应,求出当它处在这种或者那种情况下时,作用在物体上的力

耶鲁公开课 - 基础物理课程节选