名词
中文翻译：测光计
同义词：
['photometer', 'photo-measuring instrument']
例句：
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1. The photoptometer was used to measure the brightness of the scene.
测光计被用来测量场景的亮度。
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2. The photographer used a photoptometer to adjust the focus of his camera.
摄影师使用测光计调整了他的相机的焦点。
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3. The engineer used a photoptometer to measure the accuracy of his measurements.
工程师使用测光计测量他测量的准确性。