my father would like to retire at sixty.后面必须加years old表示年龄吗

题目

my father would like to retire at sixty.后面必须加years old表示年龄吗
my father would like to retire at sixty.后面必须加years old表示年龄或改为the age of 如果不加就表示年代了吗?

答案

不必,AT SIXTY 是个固定词组意思是在六十岁.
同样,有 AT SEVENTY
AT EIGHTY
可以换成 THE AGE OG 60