native crude drug 原产药材
The drug is derived from the bark of the cinchona tree, native to South America, and by 1856 demand for the drug was surpassing the available supply.
这种药物是从原产于南美洲的金鸡纳树的树皮中提取的。到了1856年,对这种药物的需求已经超过了现有的供应。
Starting about a week before the transplant, the patients also received a drug called alemtuzumab which destroyed circulating native white blood cells so they couldn't attack the transplanted cells.
移植前一周,患者授受一种称为阿仑单抗的药。该药破坏循环中的自然白细胞,使之丧失攻击移植细胞能力。
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