十二岁的单词：Twelve years old。
years：
n.年;日历年;一年时间;与某事相关的一年;年度；
（图片来自网络侵删）
year的复数
相关介绍Billy is twelve years old.
比利十二岁了。
When Depp was twelve years old, his mother bought him a guitar.
戴普12岁时，妈妈给他买了一把吉他。
The present regime has been in power for two years.
现政权已经执政两年了。
I'd say he was 25 to 30 years old.
我猜他在25至30岁之间。
There have been many changes in recent years.
近几年发生了许多变化。
Those were the best years of my life.
那些年是我一生最幸福的时光。
