名词
中文翻译：不透光性
同义词：
['darkness', 'darkness of the night', 'opacity']
例句：
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1. The noctilucence in the sky was so intense that it blocked out the moonlight.
天空中的不透光性如此之强，以至于月光都被遮住了。
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2. The noctilucence in the room made it difficult for me to see clearly.
房间里的不透光性让我很难看清楚。
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3. The noctilucence in the forest is a natural phenomenon that can be seen from a distance.
森林中的不透光性是一种自然现象，可以从远处看到。