side notching

例句：

1. 1. The car's side notchingwas designed to improve aerodynamics.
   汽车的侧面切槽设计是为了提高空气动力学性能。
2. 2. The engineer made a sidenotching on the wall to hold theshelves.
   工程师在墙上做了侧面切槽来固定架子。
3. 3. The car's sidenotching is visible from the driver's seat.
   从驾驶座可以看到汽车的侧面切槽。