decline; be on the wane; go downhill;deteriorate 軍方的影響正在～。The military’s influence is on the wane./羅馬帝國迅速～。The Roman Empire rapidly waned in power./資本主義制度的～ decline of the capitalist system/急劇～drop drastically; plummet/經(jīng)濟(jì)～decline of the economy