名词
中文翻译：Unknown
同义词：
['air inlet', 'air outlet', 'ventilation duct', 'ventilation hood']
例句：
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1. The factory has a large ventilation opening that helps to remove smoke from the building.
这个工厂有一个很大的通风开口，可以帮助从建筑物中去除烟雾。
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2. The new design of the ventilation opening is more efficient than the old one.
新设计的通风开口比旧的更高效。
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3.The engineers were working on improving the ventilation opening to make it more effective.
工程师们正在努力改进通风开口，使其更有效。