煤中微量元素的研究意义重大和广泛。
The research of trace elements in coal has great of significance.
煤中微量元素是世界洁净煤研究的热点；
The study of trace elements was focus of clean coal technology in the world.
煤中微量元素的开发利用日益受到重视。
It is more and more give emphasis to development and utilize the trace chemical element of coal in our country.
应用推荐