Mary is seven years his younger. 玛丽比他小七岁.
a [one's] younger brother [sister] 弟弟[妹妹]the Younger Pitt=Pitt the Younger 小皮特.
反义:
高考报名网英语在线翻译词典收录了155111条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。