The Mid-Autumn Festival is on september or october为什么用or

问题描述:

The Mid-Autumn Festival is on september or october为什么用or
RT

  or或者的意思,两者之中选一个.翻译:中秋节不在九月就在十月.
and则表示两者都要,既要九月又要十月怎么可能呢.