| 单词 | impurity |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔dross〕A waste product or an impurity, especially an oxide, formed on the surface of molten metal.废料或混杂物，尤指在融化金属表面形成的氧化物美国传统〔impurity〕The impurity of the water is a health risk.不洁的水质对健康是个威胁。剑桥高阶The impurity of the water is a serious health risk.水质的不洁对健康是个严重的威胁。剑桥国际 |
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