at the age of 在……岁时 加英语单词是要加在后面吗

at the age of 在……岁时 加英语单词是要加在后面吗 at the age of 英语at the age of? 翻译 at the age of at the age of five at the age of=? 翻译：at the age of at the age of造句 at the age of= "by the age of","at the age of"的区别? at the age of 7和at age 7 用法都是正确的吗? 在表达“同龄”时,at the same age 与 the same age 中加了介词at 和不加有什么 区别吗