名词
中文翻译：能见度
同义词：
['visibility', 'visibility range']
例句：
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1. Thefog made it difficult to see beyond thetree line.
雾使人们难以看到树线之外。
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2. The pilot had to reduce hisaltitude due to poor visibility.
飞行员不得不降低高度，因为能见度不好。
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3. The weather forecast warned of poorvisibility in the area.
天气预报警告该地区能见度差。