Contrapropeller
整流（螺旋）推进器, 整流螺旋桨, 同轴反转式螺旋桨
🗣️ 情景例句
Littering is a serious offense in some countries.
乱扔垃圾在某些国家是严重的违法。
To escape from the policeman
从警察手下逃亡
Excuse me! Is this your pencil-box?
请问，这是你的铅笔盒吗？