如果实体不是均匀的话，它的密度就跟选取的薄片有关了。

If you imagine that your solid is not homogenous then its density will depend on which piece of it you are looking at.

youdao

如果实体不是均匀的话，它的密度就跟选取的薄片有关了。

If you imagine that your solid is not homogenous then its density will depend on which piece of it you are looking at.

youdao