inexorability

The inexorability of the aging process is a reality that everyone must eventually accept.

(Chinese) 衰老过程的不可阻挡性是每个人最终都必须接受的现实。

Historians often debate the inexorability of the empire's decline after centuries of expansion.

(Chinese) 历史学家经常争论帝国在扩张数世纪后走向衰落的必然性。