一旦一夕

Explanation: Describe a very short time. With overnight. " 　　Source: "Records of the Historian Sima Qian preface," Chen regicide, patricide child, non-event of it overnight also, its getting numbered. " 　　Examples: Therefore, the death of Wei, dead plants and planting in favor ideas Meng won the entropy of day. Sibling guess, hand over in order to grant the others, so carry on non-~ s. ★ Qing Wang Fu-chih, "Reading Chronicle of the Three Kingdoms"