unimaginably

The distances between stars in the galaxy are unimaginably large, measured in trillions of miles.

(Chinese) 星系中恒星之间的距离大到难以想象，以万亿英里衡量。

Conditions in the ancient gold mines were unimaginably harsh for the workers who labored there.

(Chinese) 对于在那里劳动的工人来说，古代金矿的条件极其艰苦，难以想象。