protein milk

例句：

1. 1. Proteins are essential for the growth and repair of cells.
   蛋白质对于细胞的生长和修复至关重要。
2. 2. The body needs a balanced diet to ensure proper protein synthesis.
   身体需要均衡的饮食以确保适当的蛋白质合成。
3. 3.Protein powder is a popular supplement used by athletes to build muscle mass.
   蛋白粉是运动员常用的补充品，用于肌肉增长。