in the morning one doesn't know what will happen in the evening.; be unable to plan out one's day; be preoccupied with the current crisis; live in constant fear for one's doom; be in a precarious state
What good it would have done me at that time to have been tossed in the storms of an uncertain struggling life , and to have been taught by rough and bitter experience to long for the calm amidst which i now repined 那时候要是我被抛掷到朝不虑夕苦苦挣扎的生活风暴中去，要是艰难痛苦的经历，能启发我去向往我现在所深感不满的宁静生活，对我会有多大的教益呀！
