她比他小四岁。

She's four years his junior.

《牛津词典》

她比他小四岁。

She's his junior by four years.

《牛津词典》

可我依然觉得，他是纯真的小四。

I can still feel that he is innocent of the four small.

youdao

我有一个弟弟，他比我小四岁。

I have a little brother. He is four years younger than me.

youdao

小四（郭敬明的绰号），我会永远和你在一起！

Xiaosi(Guo's nickname), I will always be with you!

youdao

小四（郭敬明的绰号），我会永远和你在一起！

Xiaosi(Guo's nickname), I will always be with you!

youdao