怎么eight-hour等于eight hour's?两个词中间加"-"是有哪些作用,有什么规范

怎么eight-hour等于eight hour's?两个词中间加"-"是有哪些作用,有什么规范 Eight Hour eight times in one hour It's an eight-hour-drive to get their grandparents. eight hours' sleep 同义词 是不是eight-hour sleep eight's什么意思 Elizabeth Arden Eight Hour Cream Skin & Lip Protectant是什么牌子 myth of the eight-hour sleep这篇BBC文章好么? we have eight 可以有哪些问句 work hour load 和 work hour 有什么区别? an hour ago和an hour later有什么区别? half an hour 和a half hour有什么区别?