时不我待

Explanation: I would be: "When I" flip, waiting for me. Time will not wait for us. Mean it takes a hurry. 　　Usage: The main predicate; as object, clause; with a compliment 　　Source: Qing Qiu Jin, "Mr. Jiang Lushan gifts made by Chi-hung and claw for the future success also": "things should be difficult to sustain a loss machine, almost time when I almost do not be!" 　　Examples: The task is urgent, ~. Thesaurus:  The mill cannot grind with the water that is past., speed is precious in war, a speedy fight dispatch, seize a chance, Have no choice but Or ease, By iron is hot, avail oneself of Hydration mud, seize every minute and second, against time, Cut the Gordian knot, Broken mess knife, Now (in the time) or never!, Opportunity knocks but once., Time and tide wait for no man Antonym Group:  There is still time to mend, Zhicuojiugai, take measures in time, Gu Dog Your Brother