adding exogenous enzymes的用法和样例：
- The effects of exogenous enzymes on endogenous enzymes and the future application aspects of them were also discussed.
- The effects of exogenous enzymes on Radix ginseng extracted were studied, and the processing technologies of Radix ginseng and tea beverage were also researched.
- Effects of exogenous enzyme on volatile flavor component of fermented mutton sausage were studied in this paper.
- The added exogenous hormone and poly amino acid to culture medium can improve the inductivity of embryoid, increasing averagely 59.64% than that of the contrast.