fact of life
人生的现实或不可避免的事实
口语·接受不可避免的现实
英文释义
something that is accepted as a reality or unavoidable part of everyday life
例句
Getting older is a fact of life, so we might as well enjoy it.
典故来源
源于日常观察，指那些无法改变、必须接受的现实，如生老病死等自然规律。