when i'm 4 years old为什么加years old 而at the age of 4不加years old

问题描述:

when i'm 4 years old为什么加years old 而at the age of 4不加years old

口语可以直接when i'm 4
When I was 14, Hendry won his first title and he was a god.
当我14岁的时候亨德利已经得了他的第一个冠军,他是神.
www.calm-sea.com
at the age of 4就不能加years old了,因为前面已经有age了,再加就重复了,就成在四岁岁时了……