| 词汇 | trace element |
| 释义 | trace elementWord family nountraceabilitytraceablenesstracertracerytracingtrace elementtracing papertraceadjectivetraceabletracelesstraceriedadverbtraceablytracelessly 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 |
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