一个扑动周期内折叠翼能量耗损小于非折叠翼；
The flapping wing with a wing flexure consumes less energy than that without a wing flexure in a flapping cycle.
而扑动翼翼型弯度的增加不利于推力特性的提高。
It is disadvantageous to thrust characteristic through increase camber of airfoil.
主动脉腔内收缩期可见一条扑动的、向前运动的线性回声；
There was a fluttering lineal echo in the aortic lumen during diastole;
使用跨音速非定常空气动力，对扑动间隙和旋转间隙进行研究。
Flapping and rotary gap have been investigated with the help of transonic unsteady aerodynamic forces.
以某一飞机的带有扑动和旋转间隙的受控翼面为例进行了数值计算。
Numerical calculations were conducted on a controlled wing with flapping gap and rotating gap.
沿着山侧蜿蜒的小道一路走下山坡，可以听到路旁的树林中传出鸟儿扑动翅膀的美妙声音。
Winding down the flank of the mountain, there is a graceful fluttering in the woods off to the side of the road.
其M型超声心动图表现为：1。主动脉腔内舒张期可见一条扑动的线性回声；
The following M—mode echocardiographic manifestations were noticed: 1. There appeared a fluttering and anteriorly moving lineal echo in the aortic lumen during systole;
试验中进行了扑动频率、风速、迎角、机翼平面形状、翼型弯度对机翼气动特性影响的研究。
The effects of flapping frequency, wind velocity, Angle of attack, plane shape of wing and cambered aerofoil are investigated.
如果翅膀拍动对称的同时转动对称，就可认为翅膀的扑动是严格对称的，此时翅膀惯性力可以忽略。
How to design the control mechanic of insect-like flapping wing air vehicle to increase the symmetrical and eliminate the influence of inertia force was discussed at last.
鹦鹉对此非常高兴，扑动翅膀，从一间屋子飞到另一间屋子，愉快地尖声叫着，最后停在华丽的帷幔的边上。
The parrot was delighted at this and flapped from room to room, shrieking and screaming with happiness. At last he settled on the edge of a rich curtain.
在原有匀速刚性模型的基础上，提出考虑了扑翼扑动速率变化和形状变化的柔性扑翼模型，使之更接近鸟翼真实扑动情况。
On the basis of former rigid wing model and consideration of the velocity change and the distortion of wing plane, a flapping model is developed.
在原有匀速刚性模型的基础上，提出考虑了扑翼扑动速率变化和形状变化的柔性扑翼模型，使之更接近鸟翼真实扑动情况。
The paper also computes the flapping power and flapping efficiency of the flexible flapping-wing, and their changes with flapping angel, velocity, and so on.
在原有匀速刚性模型的基础上，提出考虑了扑翼扑动速率变化和形状变化的柔性扑翼模型，使之更接近鸟翼真实扑动情况。
The paper also computes the flapping power and flapping efficiency of the flexible flapping-wing, and their changes with flapping angel, velocity, and so on.
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