| 词汇 | trace element |
| 释义 | trace elementBrE /ˈtreɪs elɪmənt/ NAmE /ˈtreɪs elɪmənt/ noun a chemical substance that is found in very small amounts 痕量元素a chemical substance that living things , especially plants , need only in very small amounts to be able to grow well 微量元素(生物,尤指植物,生长所需要的微量的化学物质) |
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