不对,应该是he is a fifiteen-years-old boy
可以的。翻译为他是一个50岁的老顽童
不对应该he is a fifteen-year old boy
他是一个15岁的男孩he is a fifteen-years-old boyHe is a boy of 15 years old.-----------------------------希望采纳,你的支持我们的动力!
he is an fifteen years old boy