名词
中文翻译：光电管指示器
同义词：
['photoelectric cell indicator']
例句：
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1.The photocell indicator was used to detect the presence of light.
光电管指示器用于检测光线的存在。
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2. The photocell indicator was used to measure the intensity of light.
光电管指示器用于测量光线的强度。
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3.The photocell indicator was used to indicate when the switch was turned on.
光电管指示器用于指示开关是否打开。