名词
中文翻译：降低掺杂浓度
同义词：
['de-doped concentration', 'reduced dopinglevel']
例句：
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1. The researchershave found a way to reduce the doping concentration in the water.
研究人员已经找到了一种方法来降低水中的掺杂浓度。
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2. Theathletes are required to maintain a reduced doping concentration during the competition.
运动员在比赛中需要保持较低的掺杂浓度。
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3. The newdrug has a reduced doping concentration compared to its previousversion.
新药与前一版本相比，掺杂浓度较低。