时不可失

Explanation: When: opportunity, chance; missing: miss. Seize the opportunity not to be missed. 　　Source: "Qin Warring States policy four" I heard that the enemy can not easily, when you can not lose. " 　　Examples: This day I sent in retaliation for the machine, ~. (Ming Feng Meng, "Zhou Zhi" forty-ninth back) Thesaurus:  The mill cannot grind with the water that is past., speed is precious in war, a speedy fight dispatch, 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., Time and tide wait for no man Antonym Group:  There is still time to mend, Zhicuojiugai, take measures in time, Gu Dog Your Brother