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1.The scientist used a level vial to measure the height of the liquid.
科学家使用水平试管来测量液体的高度。
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2. The engineer carefully checked the level vial before filling the tank.
工程师仔细检查水平试管后才往油箱里加油。
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3. The chemical analyst used a level vial to check the concentration of the solution.
化学分析员使用水平试管来检查溶液的浓度。