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trace element

Word family
Related topics: Elements
ˈtrace ˌelement noun [countableC] technical  
1. a chemical element that your body needs a very small amount of to live 微量元素〔人体所需的微量化学物质〕
2. a chemical element that only exists in small amounts on Earth 痕量 元素
ˈtrace ˌelement noun
Chinese
Syllable

See also: trace element

trace element
Chemical elements:actinium, alkali metal, americium...

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