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问题: 这个英语句子怎么翻译通顺?

This two-volume course books for reading and writing contains enough materials for rougly 80 hours of teaching in increments of 4 hours fot each unit.

解答:

这套上下册的关于阅读和写作的教科书,所含内容够差不多80学时,每个单元用4小时来教.