Explanation: Capricious or repeated several times. Source: Lu Xun's "Janus-faced _set_ Glimpse of Shanghai Literature and Art" revolutionary literature and therefore who should pay attention to not only face the enemy, we must also prepare for his side's third four-fu secret agent turned out. " Examples: Thus, the revolutionary literature who should not only pay attention to the face of the enemy, we must also guard against their own side of ~ the detective had. (Lu Xun's "A Glimpse of Janus-faced _set_ of Shanghai Literature and Art")