她12岁用英语表达是:She is 12 years old;
years:
n. 年; 日历年; 一年时间; 与某事相关的一年; 年度。
year的复数。
old:adj. 具体年龄; (多少)岁; 年纪; 老的; 年纪大的; 不年轻的; 老年人。
相关介绍
A quarter of the residents are over 55 years old
1/4的居民年龄在55岁以上。
He's 58 years old
他58岁。
He couldn't have been more than fourteen years old.
他不可能超过14岁。
At 20 years old he was not as agile as he is now.
20岁时他并不如现在这般矫健。
He's only 24 years old and a drug addict.
他只有24岁,却是个瘾君子。


