This is what experiments are all about.

这就是实验的意义。

youdao

What experiments prove convincingly that the two masses are the same?

有什么实验令人信服地证明了两种质量是一样的呢？

youdao

What experiments prove convincingly that the two masses are the same?

有什么实验令人信服地证明了两种质量是一样的呢？

youdao