| 词汇 | trace element |
| 释义 | trace element 1 ENTRIES FOUND: trace element (noun) trace element noun plural trace elements trace element noun plural trace elements Learner's definition of TRACE ELEMENT [count] technical 1 : a chemical element that is present only in very small amounts痕量元素 2 : a chemical or element that a living thing needs in very small amounts in order to live（生命所需的）微量元素 |
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