The only problem is, nobody ever has actually dug a hole down that far.

唯一的问题是，没有人真正挖过这么深的洞。

So at some point in their lives, nearly everybody has wanted to dig a hole down to the center of the Earth.

每个人在生命中的某个时刻，几乎都会想要挖一个洞，直接挖到地心。