夜以继日

Explanation: Attached at night during the day. Describe the step up work or study. 　　Usage: Partial official; as predicate, attributive, adverbial; for work 　　Source: "Chuang-tzu to the music" your husband who, day and night, whether good thought. "" Mencius from the Lou down "and think of Yang, day and night." 　　Examples: Jun Yin season, also played Salong. Jiuchiroulin, ~. ★ San Guowei Ruan, "music theory" 　　Riddle: Next Thesaurus Group:  toil night and day, pass from night to morning, travel or toil night and day, early to rise and late to bed, neglect one's meals and sleep, rise early in the morning and late, start work early and knock off late, round the clock, On Star with Phi, round the `clock all day and all night day after day that very night, Day after day Following the night, night and day