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战国时期，秦楚两个诸侯大国相互对立，经常作战。有的诸侯小国为了自身的利益与安全，时而倾向秦，时而倾向楚。比喻人反复无常。
(1) [serve the State of Qin in the morning and the State of Chu in the evening—quick to switch sides]∶时而倾向秦国,时而倾向楚国,比喻反复无常 (2) [indefinite]∶早上在秦国,晚上在楚国,比喻行踪不定
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