lactic acid

例句：

1. 1. The fermentation process produces lactic acid as a byproduct.
   发酵过程产生乳酸作为副产品。
2. 2.This cheese is made from milk that has been pasteurized and then aged in lactic acid.
   这种奶酪是用经过巴氏杀菌并随后在乳酸中陈化的牛奶制成的。
3. 3. Lactic acid can be used to preserve food by preventing the growth of bacteria.
   乳酸可以用于保存食物，通过防止细菌生长。