three-year-old 和 three years old 有什么区别（three years old和three year old的区别）

three-year-old : 三岁大的 , 三十岁

短语

Three-year-old basic orientation 三十岁基本定向

a three-year-old girl 一位三岁的女孩

Three-year-old child 三岁的孩子

three years old : 三岁,三岁大

短语

Three years old pictures 三周岁留念

Only Three Years Old 只有三岁

you are three years old 你三岁