名词
中文翻译：极性纸
同义词：
['polarographic paper', 'polarographic strip例句：1. The scientist used polarity paper to test the new device.（科学家使用极性纸来测试这个新设备。）']
例句：
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1. The scientist used polarity paper to test the new device.
科学家使用极性纸来测试这个新设备。
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2.The polarity paper was used to detect the magnetic field in the area.
极性纸被用来检测该地区的磁场。
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3. The polarity paper was used as a reference for measuring the strength of the magnetic field.
极性纸被用作测量磁场强度的参考。