they need hundreds of hours of study and practice,能改为they need hundreds of hours to study and
问题描述：
they need hundreds of hours of study and practice,能改为they need hundreds of hours to study and
practice吗
答
They need hundreds of hours of study and practice.可以改为They need hundreds of hours to study and practise.【注】need + n.+to do sth 需要……来做某事practise 动词 practice名词