classification of minerals造句

例句与造句

1. Abstract : he international classifications of mineral resources a nd reserves were briefly introduced ; the main problems existed in the classification scheme which is formerly adopted in our country were proposed , and the necessity for the reformation of it was also given ; the significance o f the new classification standard to the development of mining industry in our c ountry was described
   文摘:对国际上矿产资源储量的分类作了简要介绍；提出了我国过去采用的分类方案所存在的主要问题以及对其进行改革的必要性；论述了新分类标准对我国矿业发展的重要意义。
2. It's difficult to find classification of minerals in a sentence. 用classification of minerals造句挺难的