As much as they would like to, biotech firms cannot comprehend and control all the factors that influence the purity and function of the macromolecules that come out of their bioreactors.

• 虽然有心想要知道影响生物反应器当中大分子纯度与疗效的每一个变因，但生物科技公司无法完全了解与控制它们。