血卟啉衍生物haematoporphyrin derivative,HpD
【计】 一阶导数first-order derivative
协变导数covariant derivative【数】
精制蛋白衍化物purified protein derivative
铃动力导数hydrodynamical derivative
【计】 微商控制derivative control
标准精制结核菌素purified protein derivative standard (PPDS)
双侧导数bilateral derivative【数】;two-sided derivative【数】