二十元可以买20瓶矿泉水，就产生了20个矿泉水瓶，再用20个空水瓶可以换10瓶矿泉水，两次加起来一共是30瓶
可以喝三十九瓶剩一个空瓶
Hague ruled in favor of the Philippines in its dis
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