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- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
- The regularity is obvious about the correspondence between mean maximum reflectance of vitrinite and classification of coals. 但总的来说，烟煤镜质组反射率与煤种之间的关系规律性明显。
- He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
- There is a hierarchy in the classification of all living creatures. 一切生物均可按等级分类。
- We had a big delivery of coal today. 今天我们收到大批订购的煤。
- classification of coal mining roof 煤矿顶板分级
- quality classification of coal oil-gas reservoirs 煤岩油气（矿）藏品质
- The country is short of known deposits of coal. 这个国家缺少已知的煤矿矿床。
- industrial classification of coal 煤工业分类
- An inexhaustible supply of coal. 用之不竭的煤炭供应
- A phylogenetic classification of species. 按演化发展对物种进行的分类
- Research on Classification of Attack Technol. 攻击技术分类研究。
- China has a wealth of coal, iron and other minerals. 中国有丰富的煤、铁和其它矿产资源。
- CLASSIFICATION OF THE GENUS CLADRASTIS RAFIN. 香槐属的分类。
- The description and classification of rocks. 岩相学，岩类学对岩石的描述和分类
- The oven holds sufficient heat to fire up a fresh charge of coal. 炉里有足够的热量使新加进的煤燃烧起来。
- What is the classification of piles? 问:痔疮严重程度的分级为何？
- We are talking about the ignitability of coal. 我们在谈论有关煤炭之可燃性。
- The microscopic study, description, and classification of rock. 岩性学对岩石的微观研究、描绘和分类
