形容词
中文翻译：无色的
同义词：
['achromatic', 'colorless', 'transparent']
例句：
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1. The aplanatic system is responsible for the colorless appearance of the sky.
无色系统负责天空的无色外观。
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2. The aplanatic system is also responsible for the transparency of the atmosphere.
无色系统还负责大气的透明度。
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3. The aplanatic system is responsible for the colorless appearance of the sky and the transparency of the atmosphere.
无色系统负责天空的无色外观和大气的透明度。