乘势chéngshì 1.利用有利的形势;就势{make use of a favourable situation; avail oneself of an opportune moment}: ～进击。{make use of a favourable situation to continue an attack} 2.〈书fml.〉凭借权势{rely on one's power and influence}: ～欺人。{use one's power and influence to hoodwink others}