Experimental investigation on the aft-element flapping of a two-element airfoil at high attack angle;
大迎角下两段式翼型后翼作俯仰拍动的实验研究
The phenomenon of beats can be observed directly on the double-channel oscillograph and the frequency of alternating current can be measured by the vibration curve of the beats.
在双通道示波器上可直观地观测拍现象 ,并利用拍振动曲线测量交流电的频率。
In this papaer,using double channel scope,the phenomenon of Lisaru figure and beats can be observed directly,the compose of simple harmonic motion on scope is deeply understood by the students.
本文通过用双踪示波器来观察李萨如图形和“拍”现象 ,加深学生对两种特殊形式的简谐振动合成的理
Nonlinear vortex-induced force identification on beat state of 1-D bluff body vertical vortex-induced vibration
一维钝体竖向拍振非线性涡激力识别
The relation between the symmetry of the beat figures and the frequency ratio n 1/n 2,the initial phases Ψ 1?Ψ 2 of the component of vibrations is analyzed.
分析了拍图形的对称性与分振动的频率比n1/n2 及初相Ψ1、Ψ2 之间的关系 ,导出了不同的Ψ1、Ψ2 (0 ,π ,±π/ 2 )与Δn(Δn =n1-n2 为奇数或偶数 )的配搭情况下的拍图形对称性规律 ,得出了拍图形对称性决定于Ψ1、Ψ2 和Δn的结
This is a picture of the city from the air.
这是张照片是从空中俯拍的城市全景。
To assume a prone position.
俯卧摆出俯卧的位置
fall [lie] prone
面向下跌倒 [俯卧]
Dive angle (pitch-down angle) high (low). Apply a little back stick.
俯冲角（俯角）大（小）了,带点杆。
Mother had to bend over to pick up the child.
母亲必须俯身抱起小孩。
He was bending over Winston.
他俯身望着温斯顿。
They all bent forward to listen to him.
他们都俯身向前听他讲。
as to embrace me she inclined,
正俯身要和我拥抱时，
The fighter plane dived on the soldiers.
战斗机向士兵俯冲下来。
The fighter plane dived on the enemy troops
战斗机向敌军俯冲。
The aircraft dived steeply and dropped its bombs.
那架飞机俯冲投弹。
Shells can be found everywhere on the beach.
海滩上的贝壳俯拾皆是。
He stumbled and lay prostrate on the floor.
他被绊倒而俯伏在地。
He could bend her to his will.
他能够使她俯首贴耳的。
He stoops to pick up the money on the ground.
他俯身拾起地上的钱。
(of an aircraft)make such a dive
（指飞机）开油门俯冲.
The eagle swooped down on its prey.
老鹰向着猎物俯冲下来。
She sat up and leaned over him.
她坐了起来，俯在他身上。