名词
中文翻译：离子计数器
同义词：
['ion counter', 'ion gauge']
例句：
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1.The ion counter measures the concentration of ions in the air.
离子计数器测量空气中离子的浓度。
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2. The ion counter is used to monitor the levels of pollutants in the environment.
离子计数器用于监测环境中污染物的水平。
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3.The ion counter was used to detect the presence of radioactive materials.
离子计数器被用来检测放射性材料的存在。