It is nearly identical to our own planet and bulk properties such as mass, density, and size.

它和我们的星球以及很多其他的特征，比如说质量、密度和体积基本是一样的。

So here we have two very similar planets in their sort of bulk properties, but they've evolved to such different states.

两个行星基本数据十分相近却最终进化成两个完全不同的形态。

It is nearly identical to our own planet in bulk properties such as mass, density, and size.

它在质量、密度和大小等体积性质上几乎与地球相同。