This transition to living in the sea involved changes from paddling with limbs to undulating the body to oscillating a tail, such as the horizontal tail flukes in modern whale species.
这种转变包括从用前肢划水到身体波动再到尾巴摆动，就像现代鲸鱼的水平尾鳍。
The horizontal tail wing of the wing-in-ground effect craft has the advantages of great ascensional force, small area and low production cost.
这种地效翼船水平尾翼，升力大、面积小、生产成本低。
Using the analytical relationship, many boundaries namely scissors sketed, could be drawn on the parameter plane of horizontal tail area and aeroplane center of gravity.
利用这种解析关系，可以在平尾相对面积和飞机重心位置的参数平面上，绘制出各种限制边界，形成所谓“剪刀图”。
In this paper, the transmission shaft of the all-moving horizontal tail for a fighter plane is considered as a structural system, and its failure probability is analysed.
本文从整个构件系统着眼，研究某型歼击机全动平尾转轴梁静强度的可靠性。
Combined with the mechanism of slipstream influence on the fuselage and horizontal tail, the paper gives the change in the longitudinal aerodynamic characteristics caused by the slipstream.
同时，对滑流影响下机身和平尾纵向气动特性的变化机理进行了研究，最后得到了全机气动特性因滑流影响产生的变化。
Combined with the mechanism of slipstream influence on the fuselage and horizontal tail, the paper gives the change in the longitudinal aerodynamic characteristics caused by the slipstream.
同时，对滑流影响下机身和平尾纵向气动特性的变化机理进行了研究，最后得到了全机气动特性因滑流影响产生的变化。
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