16岁的男孩们 英语怎么说sixteen-year-olds boy和sixteen-year-old boys哪个对?还有sixteen-year-olds对么?

问题描述:

16岁的男孩们 英语怎么说
sixteen-year-olds boy和sixteen-year-old boys哪个对?
还有sixteen-year-olds对么?

16-year-old boys