sixteen-year-olds可以直接使用,sixteen-year-old不可以直接使用后面要加boy?

问题描述:

sixteen-year-olds可以直接使用,sixteen-year-old不可以直接使用后面要加boy?
1个回答 分类:综合 2014-09-23

问题解答:

我来补答
sixteen—year—olds=sixteen—year—old persons
 
 
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