One meaning is that in one medicine packet, several kinds of medicinal crops are likely to be involved. They function respectively and work together to cure the disease or kill the pain.
一是中药通常是一副药里要有好几味药，分别具有不同的功能，同时配合起来达到总的疗效。
2
Monarch butterflies appear to use medicinal plants to treat their offspring for disease, research by biologists at Emory University shows.
埃默里大学生物学家进行的研究显示，帝王蝶好像用药用植物治疗它们后代的疾病。
3
Practitioners in China have prescribed bitter blends of medicinal plants and herbs for centuries to ward off disease in humans.