at the age of的意思和用法
问题描述：
at the age of的意思和用法
答
at the age of
在…岁时
He became a doctor at the age of 27.
他27岁时成了一名医生.
He was a middle school student at the age of 14.
他14岁时是个中学生.
例句都有,还不具体?