In the most simple case that I can think of, I have here a block m which has a certain mass, m.

在最简单的示范中，我有一个大块，它的质量为。

youdao

In the most simple case that I can think of, I have here a block m which has a certain mass, m.

在最简单的示范中，我有一个大块，它的质量为。

youdao