hundreds of hours of 怎么连读?

hundreds of hours of 怎么连读? They need hundreds of hours of study and practice. hundred ,hundreds,hundred of,hundreds of都怎么用?区别 hundreds of thousands of one of怎么连读 they need hundreds of hours of study and practic里面 的语法结构是什么? they need hundreds of hours of study and practice,这句话可以改为 they need hundreds of hours of study and practice,能改为they ne hundred hundreds hundreds of hundred of hundreds of thousand 还是 hundreds of thousand hundreds,hundreds of,hundred,hundred of hundred ,hundreds,hundred of,hundreds of...