高锰酸钾催化氧化去除水中微量有机污染物的方法，它属于水处理技术领域。

A method for removing micro organic contaminations in water by using potassium permanganate for catalytic oxidation belongs to the technical field of water processing.

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The micronutrients, the vitamins part of the micro nutrients, would fall into several categories.

微量元素,微量元素之一的维生素,各自属于不同的分类

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选