arginine

例句：

1. 1.The amino acid arginine plays a crucial role in the body's immune system.
   精氨酸在人体免疫系统中起着至关重要的作用。
2. 2.He was diagnosed with anemia, which is caused by a lack of this essential amino acid.
   他被诊断出患有贫血症，这是一种由于缺乏这种必需氨基酸而导致的疾病。
3. 3. Nutritionists recommend that people consume foods rich in arginine to improve their health.
   营养学家建议人们摄入富含精氨酸的食物以改善健康。