大学英语词汇短语释义解析及例句 coarse coal

大学英语词汇短语释义解析及例句 coarse coal


释义:

coarse coal 大块煤

例句:


This paper introduces existing problem of original coarse coal mire retrieving system, puts forward improving way. Effect is good after improved.

介绍了原粗煤泥回收系统存在的问题,提出改进措施,改造后效果很好。

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