Facing the severe situation of China's mineral resources in 21st century, the study of nontraditional mineral resources has great strategic significance.
面对我国21世纪严峻的矿产资源形势，开展非传统矿产资源研究具有重要的战略意义。
Facing the severe situation of China's mineral resources in 21st century, the study of nontraditional mineral resources has great strategic significance.
面对我国21世纪严峻的矿产资源形势，开展非传统矿产资源研究具有重要的战略意义。
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