名词
中文翻译：风向
同义词：
['outflow', 'inflow']
例句：
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1. The wind is blowing from the southwest.
风从西南吹来。
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2. The ventilation system is designed to remove harmful gases from the building.
通风系统设计用来从建筑物中去除有害气体。
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3.The ventilation system helps to maintain a comfortable indoor environment.
通风系统有助于保持室内舒适的环境。