例句 /

Studying the spreading circumstance of meteorite crater group, will be very economically valuable to the research of spreading rule and reasonable development of rare mineral water, special mineral.

Studying the spreading circumstance of meteorite crater group, will be very economically valuable to the research of spreading rule and reasonable development of rare mineral water, special mineral.

掌握陨石坑群的分布状况,对珍稀矿泉水、特种矿物等资源分布规律的研究和合理开发也有着重大的经济价值。