offshore gas海上采气offshoreadj.近海的；离岸的；海外的adv.离岸地；近海地offshore wind turbine海上风机offshore construction海上施工offshore pile testing水上试桩offshore oil platform海洋石油平台offshore work pipeline近海海底管线offshore beach terrace滨外滩阶地offshore dollar market境外美元市场offshore floating dock海上浮船坞offshore tug cementing海上拖轮固井offshore gravity meter海洋重力仪