About 25% of adults world-wide suffer from
chronic halitosis that has nothing to do with serious illness. Below, some bad-breath basics:
世界约有25%的成年人患有并不代表体内存在严重疾病的慢性口臭。以下是关于口臭的一些基本情况：
It starts in the mouth. Most of the time, halitosis is caused by
bacteria buildup
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