accumulate day by day and month by month; accumulate over a long period; by slow accumulation
? ～，有了一大包銀子。(馮夢龍《醒世恒言》三) Bit by bit he accumulated a large parcel of silver.
日積月累
accumulate over a long period;by piecemeal accumulation
他～，有了豐富的經(jīng)驗(yàn)。He has gradually accumulated a wealth of experience.
日積月累rì jī yuè lěi
形容一天一月地不斷積累。accumulate over a long period, day by day and month by month, days and months multiplying