offshore gas海上采气offshoreadj.近海的；离岸的；海外的adv.离岸地；近海地offshore area of China中国近海offshore boring island钻井平台offshore work platform海上作业平台offshore seas of China中国近海offshore water anality近海水质offshore drilling unit海上钻井装置offshore supply vessel海上供应船offshore wind turbines海上风电offshore patrol vessel海底巡回船offshore earth station近海地面站