名词
中文翻译：水镜
同义词：
['mercury lantern', 'mercury mirror']
例句：
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1.The hydroscope was used to detect the presence of mercury in the water.
使用水银镜检测水中是否存在汞。
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2.The scientist used a hydroscope to observe the effects of temperature changes on the water.
科学家使用水银镜观察温度变化对水的影响。
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3. The hydroscope was an important tool in ancient Egypt for measuring the length of the Nile River.
水银镜是古埃及测量尼罗河长度的重要工具。