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.
【正确答案】
【答案解析】他们试图发展令人信服的针灸理论，来说明银针是如何止痛，比如，为何在手腕上扎针却能制止嘴部的疼痛。