和球形“地球”具有同等体积的立方体的每个边长应当是10000公里，每个顶点到立方体中心的距离是8700公里！

A cube with the same volume as the spherical Earth would have a side 10, 000 km (6, 400 miles) long so the corners are 8700 km from the center!

youdao

我在这里使用了8个顶点(立方体的顶点)并使立方体的中心与坐标系的原点相重合。

I've used eight vertices (the cube's corner points) and placed the cube's center at the coordinate system's origin.

youdao

由于我将立方体的中心点放在坐标系原点位置处，因此立方体的各边长应为 2 个单位。

Remember that I placed the cube's center at the coordinate system's origin; therefore, the cube's edges will be two units long.

youdao

So in order to fill them, he would have to have eight electrons or an octet around the cubes.

因此为了填满它们，他必须放上八个电子或者说一个“八隅体“,在立方体周围。

麻省理工公开课 - 化学原理课程节选

So, basically what he's showing in these cubes is that there are eight spaces that need to be filled up to have a full cube.

因此，基本上他在这里展示是这些立方体中一共有,八个位置，需要把它们都填满才得到一个完整的立方体。

麻省理工公开课 - 化学原理课程节选

So, let's go back to the notes, and let's fill these in, seven electrons. Another way you could have known them was to look at Lewis' notes here, where if look at this box carefully you see there are seven dots around the cube, so there are his seven valence electrons.

那么，让我们回到讲义，把它们填进去，七个电子，还有另外一种方法可以知道这些,那就是看看路易斯的讲义这里，大家可以看到这个立方体周围有七个点,因此有七个价电子。

麻省理工公开课 - 化学原理课程节选