ring-fanned holes

例句：

1. 1. The engineer designed the building with a series of ring-fanned holes to improve air circulation.
   工程师设计这座建筑时，采用了一系列环形通风孔来改善空气流通。
2. 2. The new model car has a unique design that includes ring-fanned holes for better aerodynamics.
   这款新型汽车拥有独特的设计，包括环形通风孔以提升空气动力学性能。
3. 3. The scientist found that the ring-fanned holes in the device could significantly reduce noise levels.
   科学家发现该设备中的环形通风孔可以显著降低噪音水平。