| 单词 | radon |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔acknowledge〕There is an acknowledged risk of lung cancer from radon.氡被认为有诱发肺癌的危险。柯林斯高阶〔emanation〕Chemistry Any of several radioactive gases that are isotopes of radon and are products of radioactive decay.【化学】 射气：几种氡的同位素的放射性气体，是放射性物质衰变的产物美国传统〔gas〕They detected high levels of radon gas in the building.他们测出这座建筑物内氡气含量非常高。麦克米伦高阶〔know〕Radon is known to be harmful to humans in large quantities.众所周知, 大量的氡对人类是有害的。外研社新世纪〔know〕Radon is known to be harmful to humans in large quantities.众所周知，大量的氡会对人体造成伤害。柯林斯高阶〔radon〕Tests showed high radon levels.试验表明氡含量较高。剑桥高阶 |
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