名词
中文翻译：高云层
同义词：
['high cloud', 'high stratus']
例句：
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1.The weather forecast indicated a high cloud overthe city.
天气预报显示城市上空有高层云。
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2. The pilot noticed the high cloud anddecided to take a different route.
飞行员注意到高层云，决定改变航线。
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3. The altostratus was causing some confusion forthe pilot.
高层云给飞行员带来了一些困惑。