trace element
US /ˈtreɪs ˈɛl.ɪ.mənt/
UK /ˈtreɪs ˈɛl.ɪ.mənt/
名词
微量元素
a chemical element present only in minute amounts in a particular sample or environment
示例:
•
Zinc is an essential trace element for human health.
锌是人体健康必需的微量元素。
•
Soil analysis revealed a deficiency of certain trace elements.
土壤分析显示某些微量元素缺乏。