In the blink of an eye, black hair turns to white.
转瞬之间，黑发已成白发。
该句通过时间短语和对比意象强调时间流逝的迅速与不可逆。
"As the moon sets in the west and the sun rises in the east"
"With every step we take, the ground beneath us falls into eternity."
"Life is like a torrent; the past cannot be held."
"Time flies like an arrow, and the sun and moon pass like a shuttle."
"Time silently strips away old memories and past scenes."