The micronutrients, which are available in food but in smaller amounts, are vitamins, minerals, and water.

微量营养素,在膳食中所占比重较小,它们是维生素,矿物质和水

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

They appear in food in pretty small amounts which is why they're the micronutrients;, but they're vital for health, so if you're deficient in micronutrients you've got big problems.

它们在食物中所占比重很小,这也是称它们为"微量元素"的原因,但它们对健康的意义却是至关重要的,如果缺乏微量元素的话会很糟糕

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选