词汇	dead space gases
释义	dead space gases 医无效腔气量
随便看	rural land stock-cooperation Rural Land Stock System rural land survey rural land system rural land system reform rural land tenure rural land tenure market rural land tenure system rural land transfer rural land transference rural land transferring rural land usage rights rural land use rural land use right rural land-use right transfer rural land uses Rural land usufruct circulation rural land utilization system Rural latrine improvement rural laud authority investigation rural law rural leader rural left-behind children rural left-behind population rural left-behind young children