I'm at the age of 16有这种用法吗?若有,后加years old行吗?

I'm at the age of 16有这种用法吗?若有,后加years old行吗? when i'm 4 years old为什么加years old 而at the age of 4不加years ol At the age of five years old I·m a 25 years old man,I want to find one at the age of 18 t 一些关于介词的用法at the age of by the age of有什么区别 yrars old 和 years of age 有什么不同? 有没有at one's age ＋数字 这种用法 一篇英语阅读,Rose left school at the age of seventeen years old,an ___6 years old,her dad died.填At the age of\when she was\Bein 单词后加-age后用法有什么不同 at the age of的用法 at the age of 7和at age 7 用法都是正确的吗?