10-year-old,意思是十岁的,是形容词,多用作定语,修饰名词.例如:I have a 10-year-old daughter.the 10-year-old 也可以用作名词.如:He is the most diligent among the 10-year-old.\x0d10 year old,是个形容词短语,多用作表语.例如：My daughter is 10 year old.