名词
中文翻译：云
同义词：
['fog', 'mist', 'vapor', 'foghorn']
例句：
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1. The sky was filled with clouds as the sun set.
太阳落山时，天空被云朵填满。
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2. The weather forecast predicted a cloudy day.
天气预报预测了多云的一天。
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3. The clouds above her head were so thick that she couldn't see the stars.
她头顶上的云层如此厚重，以至于她看不见星星。