in course of/in the course of
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in course of 在……的过程中,在……中

如:The new textbook is in course of preparation.新教科书正在准备之中.

in the course of = during 在……期间,在……的时候

如:He has seen many changes in the course of his long life.他在漫长的一生中目睹了许许多多的变化.

The company will face major challenges in the course of the next few years.这家公司以后几年将面临重大的挑战.