名词
中文翻译：方向发射率
同义词：
['directional transmittance', 'directional transmission']
例句：
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1. The newsatellite's directional emissivity is measured to be 98%.
新卫星的方向发射率为98%。
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2.The directional emissivity of the material is crucial for its performance.
该材料的方向发射率对其性能至关重要。
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3. The directional emissivity of the sun's light is used in solar panels.
太阳光的方向发射率被用于太阳能板。