she is a ten-year-old girl.等于什么
问题描述：
she is a ten-year-old girl.等于什么
答
She is at the age of ten.
答
she is a ten years old girl
she is ten years old
答
She is a girl of ten years old (可能错误)
She is at the age of ten
中间的短横是连接,意思为"十岁的",是形容词,形容词修饰名词
答
she is a ten years old girl
答
she is a ten years old girl
就是year的单复数问题