L-lactic acid

例句：

1. 1. The bacteria convert the sugar into lactic acid.
   细菌将糖转化为乳酸。
2. 2.This process is essential for the production of lactic acid.
   这个过程对于生产乳酸至关重要。
3. 3.Lactic acid is a common ingredient in many types of fermented foods.
   乳酸是许多发酵食品的常见成分。