然而喜欢读通俗科学文章的学生是那些喜欢读有关学习方法文章学生的两倍.
However,the number of students ( 主语)who enjoy reading popular science articles(定语从句) doubles(这里是动词,作主句的谓语) that of those ( 宾语) who prefer reading articles about learning methods,(定语从句)
然而喜欢读通俗科学文章的学生是那些喜欢读有关学习方法文章学生的两倍.
However,the number of students ( 主语)who enjoy reading popular science articles(定语从句) doubles(这里是动词,作主句的谓语) that of those ( 宾语) who prefer reading articles about learning methods,(定语从句)