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1. The laboratory uses arsenic apparatus to test the samples.
实验室使用砷器具来测试样本。
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2. The scientist used an arsenic apparatus to analyze the chemical reaction.
科学家使用一个砷器具来分析化学反应。
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3. The arsenic apparatus was designed to detect trace amounts of mercury in water samples.
这个砷器具被设计用来检测水样中微量的汞。