名词
中文翻译：亮度
同义词：
['brightness', 'illuminance']
例句：
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1. The sun's luminosity is measured in watts.
太阳的亮度是以瓦特为单位测量的。
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2. The new streetlights have a much higher luminosity than the old ones.
新街灯的亮度比旧的要高得多。
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3. The scientist used a special device to measure the luminosity of the star.
这位科学家使用了一种特殊的设备来测量这颗恒星的亮度。