free amino acid的用法和樣例：
例句
- The contents of Amino Acids in Pheretima were determined by Antomatic Amino Acids Analyzer.
用氨基酸自動分析儀測定提取液中遊離氨基酸的含量。 - In order to get the yeast feed of active-peptide and amino acids, Candida utilisl422 were autolyzed by the proteinase at the proper conditions.
利用內源酶系對產朊假絲酵母進行自溶，即得富含活性肽和多種遊離氨基酸的飼用酵母提取物。
