rock bottom
觸底，已經(jīng)到達最低點
口語·形容最低谷
英文釋義
the lowest possible point, the absolute bottom
例句
After losing his job and home, he hit rock bottom before starting to rebuild his life.
典故來源
源自地質(zhì)學，'rock'指巖石，'bottom'指底部，比喻無法再下降的最低點。