怎么eight-hour等于eight hour's?两个词中间加"-"是有哪些作用,有什么规范为什么是eight hours'呢?所有格的用法不清楚/

Eight Hour 怎么eight-hour等于eight hour's?两个词中间加-是有哪些作用,有什么规范为什么是eight hours'呢?所有格的用法不清楚/ eight： eight times in one hour eight hours' sleep 同义词 是不是eight-hour sleep Eight-Hour-Cream-Skin-Protectant是什么意思 twenty eight怎么读 eight怎么读 eight怎么读 date at eight怎么翻译 Mr Wang work eight hours every day对eight hour提问 帮我翻译一下Eight Hour Cream是什么意思 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? It's an eight-hour-drive to get their grandparents. 8,850用英语怎么说是eight thousand eight hundred and fifty还是eighty eight fifty? there is atrain every hour on the hour and every twenty-eight minutes past tthe hour + FOUR + ------- -------EIGHT