译:岁月不待人.

Time and tide wait for no man
时光如逝水,岁月不待人.

(谚)岁月不待人(机不可失).
Time and tide wait for no man(saying)

岁月不待人。——波普
Time and tide wait for no man. —Alexander Pope

他凝视着镜中自己日见花白的头发,感慨岁月不待人
He gazed ruefully in the mirror at his greying locks

最简单的就是：
Time won't wait.

Time waits for no man.

Time waits for no man.