The term "complementary and alternative medicine" (CAM) encompasses a wide array of health care practices, products, and therapies that are distinct from practices, products, and therapies used in "conventional" or "allopathic" medicine. Some forms of CAM, such as traditional Chinese medicine and Ayurvedic medicine, have been practiced for centuries, whereas others, such as electrotherapy, are more recent in origin.

你最好还是找你的“白人朋友”给你解释一下上面的话。