nutritional agents

例句：

1. 1. The nutritional agent in this productis essential for maintaining good health.
   该产品中的营养补充剂对保持健康至关重要。
2. 2. Theresearcher found that the nutritional agent couldsignificantly improve the immune system.
   研究者发现，这种营养补充剂可以显著提高免疫系统。
3. 3.The nutritional agent was designed to provide essentialvitamins and minerals to the body.
   这种营养补充剂被设计来为身体提供必需的维生素和矿物质。