| 释义 |
coal mine development
基本例句
煤炭开发
In coal mines,coal exploitation and environmental control shall be sychronized.煤矿建设应当坚持煤炭开发与环境治理同步进行。
China with a history of six or seven thousand years of development of coal utilization is one of those countries that first recognised and utilized coal.摘要中国是世界上最早认识和利用煤炭的国家之一，有长达六七千年的煤炭开发利用史。 |