问答题

They are trying to develop a convincing theory to explain how the needles work in preventing pain, or why a needle in the wrist, for example, would prevent the pain in the area of the mouth. ( Passage 3 )

【参考答案】

他们正在努力提出一种有说服力的理论，采解释针灸是怎样止痛的，或者举例来说，针扎在腕部为什么能治疗口腔疼痛。

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