cysteic acid

例句：

1. 1. Cysteine is an essential amino acid that plays a crucial role in protein synthesis.
   胱氨酸是一种必需的氨基酸，在蛋白质合成中起着至关重要的作用。
2. 2.The body needs sufficient amounts of cysteine to maintain its health and function properly.
   身体需要足够的胱氨酸来保持健康并正常运作。
3. 3. In some cases, high levels of cysteine can be toxic, so it's important to monitor the diet and intake of this amino acid.
   在某些情况下，高浓度的胱氨酸可能是有毒的，因此监测饮食和摄入这种氨基酸是很重要的。