outside air intake duct

例句：

1. 1. The car's engine is designed to efficiently intake outside air.
   这款车的发动机设计用来高效地吸入外部空气。
2. 2. The factory uses this type of duct to distribute fresh air throughout the building.
   这家工厂使用这种管道来在整个建筑中分配新鲜空气。
3. 3.The engineer installed a new duct system to improve indoor air quality.
   工程师安装了一个新的通风系统，以提高室内空气质量。