柯林斯詞典lactic acid /?l?kt?k ??s?d/ 1. N-UNCOUNT Lactic acid is a type of acid which is found in sour milk and is also produced by your muscles when you have been exercising a lot. 乳酸 返回 lactic acid劍橋詞典an acid that exists in sour milk and is produced in muscles after a lot of exercise 乳酸 返回 lactic acid