Finally, it better defined some of the areas (metal prices, riser applications and rates of return from relevant land-based sources for the metals contained in polymetallic nodules) that should be monitored by the Authority.
最后，讲习班对应由管理局监测的一些领域（金属价格、隔水管申请和多金属结核所含金属的相关陆上来源的收益率）作了更好的界定。