Yet the most widely used analgesics today are essentially folk remedies that have served for centuries: morphine and other opiates derive from the opium poppy, and aspirin comes from willow bark.
英
美
释义
然而,今日最多人使用的止痛药,基本上是用了好几世纪的民间土方,譬如从罂粟花提炼出来的吗啡与其他鸦片类,以及从柳树皮萃取出来的阿斯匹灵。
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