secondary nutrient

• 次级营养素

secondary nutrient的用法和样例：

例句

1. The protein in meat is a nutrient for people and many animals.
   肉类所含的蛋白质对人们和许多动物而言是种营养素。
2. Chocolate is one kind of very comprehensive nutrient food.
   巧克力是一种营养素很全面的食品。