Changden.常德changn.Chang: 长江；扬子江=Yangtze.Changzhutan urban group长株潭城市群changing characteristic变化特征changing and unchanging变与不变changing the conditions环境调控Chang Zhu Tan logistics长株潭物流Changing the subject.变换话题。Changji' an PrescriptionChangsheng oral solution畅声口服液changing picture element迁移像素Changpo tailing mine dam长坡尾矿坝