洋葱营养价值高，是高血压、高血脂病人的绝佳保健食品。可是切洋葱的时候，总是会被洋葱的味道辣得流泪。想知道这是为什么吗？请看下面的文章。 It is not the strong odor of the onion that makes us cry, but the gas that the onion releases when we cut this member of the lily ...

It is not the strong odor of the onion that makes us cry, but the gas that the onion releases when we cut this member of the lily family. The onion itself contains oil, which contains sulfur, an ...

Since the recognition of reflux oesophagitis as a disease entity, scientists and clinicians have commonly assumed that the first step in its pathogenesis was a loss of superficial epithelial cells, ...