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
We may revise it this evening, and have it ready to be signed tomorrow morning.
今天晚上我们修改一下并做好准备，明天早上正式签订。
Don't you have my hat?
你没拿我的帽子吧？
There are some boats on the river.
河上有几艘船。