百无一失

Explanation: Describe fully grasp, will not go wrong. 　　Usage: Predicate; as predicate, object, attribute; describe things very confident that no errors 　　Source: Tang Peixing "Nie": "(Yin Niang) year after the puncture point no risk at all apes." 　　Examples: This task is very important, not only to complete, but also to do ~. Thesaurus:  d*amn all right, to a hair; not an iota of diference, accuracy inerrability, every shot hits the target, Eyesight, shoot an arrow through a willow leaf a hundred pass away,shoot with great precision, Chuanyangsheliu, plan Completely calculate, Arrow does not shoot without hitting the target, Lose a modicm, No Sword shoot without hitting the target Antonym Group:  Leaf shelter project Vanish tarzan, Blinders, Cannot see the wood for the trees., vanish deforest, To see only Trees vanish deforest, tunnel, improvidence