cystininc acid的用法和样例：
例句
- Cysteine deficiency provides another compelling explanation for the observed deficiency since this amino acid is the rate-limiting precursor amino acid for glutathione synthesis.
因为半胱氨酸是合成谷胱甘肽的关键性前体氨基酸，所以缺乏半胱氨酸为谷胱甘肽不足提供了另一个令人信服的解释。 - Since folic acid reduces homocysteine concentrations, it follows that increasing folic acid consumption will reduce the risk of heart attack and stroke.
因为叶酸降低同型半胱氨酸的浓度，同样叶酸浓度的升高就可以降低心脏事件和卒中的风险。
