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
I don't know why I didn't think of it.
我不知道为什么我没有想到这一点。
Would he have seen you if you hadn't waved to him?
如果你没向他招手他会看见你吗？
Don't worry about that. Right now you need to stay still until help comes.
别为这事担心。现在，在有人来之前，你必须要呆着不动。