拼音:chéng dí bù yú
注音:ㄔㄥˊㄉㄧˊㄅㄨˋㄩˊ
解释:虞:料想。军事上指乘敌人懈怠,采取某种敌人预料不到的行动。
出处:《草庐经略》:“兵者,机之行之者也。……速者乘彼不虞。”
Yu: expected. Militarily, it refers to taking advantage of the enemy's slack and taking some action that the enemy does not expect.
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