levan

例句：

1. 1. The protein leucine is essential for muscle growth.
   亮氨酸是肌肉生长所必需的蛋白质。
2. 2.The body needs leucine to maintain its immune system.
   身体需要亮氨酸来维持免疫系统。
3. 3. The diet of a leucine-rich diet can help prevent heart disease.
   富含亮氨酸的饮食有助于预防心脏病。