Evidence from a 1997 study at the University of California shows that several patients who received such substances were able to produce their own naturaldrug.
1997年加利福尼亚大学的一项研究表明，一些接受了这种物质的病人能够产生他们自己的天然药物。
2
Smiling is a naturaldrug.
微笑是一种天然的药物。
3
Flavonoids is a kind of naturaldrug which has broad application future.