他们很快就开船了，由汤姆掌舵，哈克划后桨，乔划前桨。
They shoved off, presently, Tom in command, Huck at the after oar and Joe at the forward.
前桨手：在船头摇橹、划桨或荡桨的人。
哈克划右桨，乔划前桨。
美国西科斯基公司的X2拥有一部安装在后方的推进螺旋桨，这使它获得高速的前飞速度。
The Sikorsky X2 has a pusher propeller mounted at the rear to obtain its high forward speed.
旋翼桨盘处的诱导速度分布采用自前向后直线增大的形式。
The distribution of induced velocity at the rotor is assumed linearly variable over the disk.
引入尾流收缩比因子，并将大速度时的涵道等效为圆形机翼，建立了一个适合于直升机悬停和前飞状态涵道尾桨气动特性分析的动量理论方法。
The shroud at high speed is modeled as an elliptic wing in order to construct a momentum theory method to investigate the aerodynamic characteristics of ducted tail rotor in hover and forward flight.
考虑到螺旋桨驱动的固定机翼飞机是在一个世纪前的技术，这似乎是一个需要跨越的障碍。
This may sound like a low hurdle to jump given that prop-driven fixed-wing airplanes are a century old.
考虑到螺旋桨驱动的固定机翼飞机是在一个世纪前的技术，这似乎是一个需要跨越的障碍。
This may sound like a low hurdle to jump given that prop-driven fixed-wing airplanes are a century old.
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