The purpose of oil refinery is to refine crude petroleum.炼油厂的主要工作是提炼原油.I really do not think that an inquiry would serve any useful purpose...我真的认为调查没有任何实际意义。The purpose of this article was to explore academic origin of ...
All the units employ hollow burned - clay blocks as the basic raw material.所有构件都用空心陶土砖做基本原料.Analogue computers are generalpurpose devices which employ laws of physics for performing mathematical operations.模拟计算机是用物理定律进行数...