柯林斯詞典zero hour 1. N the time set for the start of an attack or the initial stage of an operation 零時(shí); 攻擊或行動(dòng)開(kāi)始時(shí)間[軍事] 返回 zero hour劍橋詞典the time at which something, especially some type of military activity , is planned to begin 行動(dòng)開(kāi)始時(shí)間；（尤指軍事行動(dòng)的）發(fā)動(dòng)時(shí)刻 Indian English in the Indian parliament , the time during which members of parliament can ask questions without arranging to ask them first （印度議會(huì)的）自由問(wèn)答時(shí)間 返回 zero hour