inlet flap

例句：

1. 1. The car's front bumper is designed to reduce the air resistance at the inlet.
   汽车的前保险杠设计用来减少进气阻力。
2. 2. The inlet flap on this aircraft is crucial for its aerodynamic performance.
   这架飞机的进气道扰流板对其气动性能至关重要。
3. 3. The engineer replaced the old inlet flap with a new one, hoping to improve efficiency.
   工程师用一个新的进气扰流板替换了旧的，希望提高效率。