桨叶

They usually seat one or two people and are propelled with a double-ended paddle.

它们通常容纳一两个人，以双叶桨推动前进。

Nautical A wooden implement having a blade at one end or sometimes at both ends, used without an oarlock to propel a canoe or small boat.

宽叶短桨：一端有扁平的叶片或者有时两端都有叶片的一种木制工具，使用这种工具不用桨架就可以推动船或小舟

A wooden implement having a blade at one end or sometimes at both ends,used without an oarlock to propel a canoe or small boat.

宽叶短桨一端有扁平的叶片或者有时两端都有叶片的一种木制工具，使用这种工具不用桨架就可以推动船或小舟

The theoretical analysis and experiments are made to prove the dynamic vibrations produced by the lugs of a paddle wheel and the wave equation is proposed.

由理论分析和试验证明了桨式叶轮的推力和运动的波动性受轮叶数N的影响，并提出了力和运动的波动方程。

Aerodynamic performance calculation based finite blade vortex theory and aerodynamic optimization design based genetic algorithms.

基于有限片桨叶涡流理论的气动性能计算和采用遗传优化算法的优化设计。

C44 Tail rotor blades with titanium pitch horns (4) made up of an inboard torque tube section and an outboard air foil section and a composite graphite/fibreglass flexbeam.

尾桨桨叶，有内部扭距管和外部衬套及石墨/玻璃纤维复合材料梁组成。

The mixing power and circulation characteristics of Newtonian fluid and pseudoplastic fluid were measured in a φ300mm organic glass vessel,by using anchor and tri-leaf impeller,anchor and inner-outer screw,orthogonal twi-stratm triangle blades and single screw,orthogonal twi-stratum triangle blades and inner-outer screw types of combined agitators.

为使聚合釜内搅拌介质在湍流、过渡流及层流域都能达到良好的混合，对锚－三叶推进器、锚－内外单螺带、正交双层三角桨－单螺带、正交双层三角桨－内外单螺带等4种组合桨搅拌器，于φ300mm的有机玻璃釜中，测定了在牛顿流体和假塑性流体中的搅拌功率和循环特性。

This paper also presents the fatigue testing of helicopter composite tail rotor blade.

本文主要研究这些缺陷对复合材料桨叶疲劳寿命的影响。

Difference of prepreg technique and the tail rotor rigidity were the key resulting in product life decline.

预浸料工艺性能的差异及桨叶刚度不足是造成产品寿命下降的主要原因。

A calculated model for predicting wing download of the tiltrotor in hover and forward flight was given according to the aerodynamic interaction effect of the rotor downwash flow on the wing.

该模型中，旋翼在机翼处产生的诱导速度以及对机翼干扰的旋翼尾迹边界基于Weissinger-L升力面理论和自由尾迹方法计算，以考虑倾转旋翼桨叶的大负扭转和尖削带来的较大三维影响，机翼表面流则区分为弦向流及展向流，以分别计算向下载荷。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。