名词
中文翻译：负折射率
同义词：
['negative refraction', 'negative refractive index']
例句：
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1. Thelight travels through the medium at a speed that is slower than the speed of light in vacuum.
光通过介质的速度比真空中光速慢。
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2. The negative diopter of this lens is 1.5.
这个透镜的负折射率为1.5。
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3. The negative diopter of the optical system can be adjusted to optimize performance.
光学系统的负折射率可以调整以优化性能。