词汇	proenzyme, zymogen
释义	proenzyme, zymogen 酶原；酶的无活性前体。
随便看	two stage supercharger two-stage supercharger two stage supercharging two-stage supercharging two stage superheater two-stage superheater two-stage supply chain two-stage suspended river two stage suspension two-stage sweating two-stage swelling procedure two stage switch Two-stage switch two stage system two-stage system twostage tandem falsetwister two stage tandem false twister two-stage technique Two-stage temperature compensation two stage temperature refrigerator two-stage temperature refrigerator two-stage temperatures refrigerator two-stage temperature-varied synthesis two-stage tendon grafting two-stage tensile test