及锋而试

Explanation: And: x; front: a sharp, motivated metaphor; test: trial. Take advantage of the sharp time with it. Originally referred to morale when used by the military, take advantage of the opportunity after the action metaphor. 　　Usage: Partial official; as predicate; metaphor of the machine by acting feasible 　　Source: Qian Han, "Historical Records emperor of the Millennium": "Matrimony his soldiers are the people of Shandong. Night and day return rate and look, and its front and use it, can have great merit." 　　Examples: Since then practice when necessary to avoid some of the thorns do not, recharge your batteries, to be ~. (Lu Xun, "the two books Five")