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1.The scientists used a nuclide reagent to analyze the sample.
科学家们使用一种核试剂来分析样本。
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2. The experiment required the use of a nuclide reagent.
实验需要使用一种核试剂。
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3. The researcher found that the nuclide reagent was effective in detecting the contaminant.
研究员发现这种核试剂能有效检测污染物。