这是一架有八个座位的双螺旋桨飞机。
我船是单螺旋桨还是双螺旋桨船？
双螺旋桨在向前推进时向内旋还是外旋？
我船是双螺旋桨。
由连接在脚踏带上的双螺旋桨提供动力，潜艇的时速可达到8公里，并能下潜至6米深。
Powered by twin propellers connected to a pedal belt, the mini-sub can reach speeds of 8 kilometers an hour and can reach depths of 6 meters.
反向旋转双螺旋桨搅拌器迅速的搅拌作用和各种转速能快速使蒸汽和奶酪颗粒融合。
The blending action and variable RPM of the counter-rotating twin agitators quickly "fuse" the steam and cheese particles together.
本船为钢质双体船，前倾艏柱，方艉圆舭，艏升高甲板单层露天甲板，双主机双螺旋桨双舵。
This vessel is made of steel, catamaran, fore raked stem, transom stern, round bilge, fore raised deck, single open deck, double main engines, double propellers, double rudders.
反向旋转双螺旋桨搅拌器设计结合了独特的螺纹，在剪切奶酪时柔和搅拌奶酪，提高奶酪质量。
The counter-rotating twin-screw agitator design combined with the unique solid screw flights gently blends the cheese while it imparts a shearing action - improving quality.
在建立舰船辐射噪声仿真模型的基础上，推导了单、双螺旋桨舰船辐射噪声调制谱谐波族幅值特征的数学期望表达式。
On the basis of building the ship radiated-noise model, the mathematical expectation expressions of ship radiated-noise demodulation spectrum harmonic clan feature were educed.
在建立舰船辐射噪声仿真模型的基础上，推导了单、双螺旋桨舰船辐射噪声调制谱谐波族幅值特征的数学期望表达式。
On the basis of building the ship radiated-noise model, the mathematical expectation expressions of ship radiated-noise demodulation spectrum harmonic clan feature were educed.
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