we can travel long distances within hours
问题描述:
we can travel long distances within hours
distances为什么要加S?
hours为什么也要加S?
答
我们可以在几小时内做长距离旅行
distance既可以当可数名词也可以作为不可数
做旅程时是可数的
一段旅程,多段旅程
hours本身就是可数
这里需指"数小时"
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