32.Lesson 49 is another way of saying theforty-ninth lesson.
问题描述：
32.Lesson 49 is another way of saying theforty-ninth lesson.
32.Lesson 49 is another way of saying the forty-ninth lesson.
为什么用forty-ninth而不用forty-nine
答
forty-ninth是一个序数词,就是第49的意思
第49课当然就要用forty-ninth,写成数字就是49th