This number is so high because… … Earth is a really hard gravity hole to get out of.

这个数字如此之高是因为… … … … 地球是一个很难摆脱的引力洞。

" You get this mixing of space and time, " she said, adding that is what makes black holes so hard to understand.

" 黑洞使我们看到了空间和时间的混合，" 她还补充说，这正是黑洞如此难以理解的原因。