是有区别的!
thirteen years old相当于一个短语
thirteen-year-old相当于一个形容词
例如:the boy is thirteen years old
he is a thirteen-year-old boy
明白了吗?还不明白再来找我·····
是有区别的!
thirteen years old相当于一个短语
thirteen-year-old相当于一个形容词
例如:the boy is thirteen years old
he is a thirteen-year-old boy
明白了吗?还不明白再来找我·····