搜尋結果
trace element
- IPA[trās ˈeləmənt]
美式
- a chemical element present only in minute amounts in a particular sample or environment.;a chemical element required only in minute amounts by living organisms for normal growth.
noun: trace element, plural noun: trace elements
- 更多解釋
英式
- a chemical element present only in minute amounts in a particular sample or environment.
Oxford Dictionary