每隔三天用英语怎么说?是every other three day 还是 every other three days,也就是说every other 后到底要加可数名词单数还是复数?为哪样?可以说说理由吗?
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每隔三天用英语怎么说?是every other three day 还是 every other three days,也就是说every other 后到底要加可数名词单数还是复数?为哪样?可以说说理由吗?