The mountains along the Yangtze River are green, especially after a drizzling rain.

Opening his eyes, he found that it was a dark, windy morning, with a drizzling rain: and that the real gong was giving dreadful note of preparation, down in the hall.

他睁开眼睛，看到这是个黑暗的、刮风的早晨，下着蒙蒙细雨；真正的锣正在楼下前厅中发出可怕的声音，通知大家，是准备上课的时候了。

One day, amid a drizzling rain, wet everywhere.

一天，天下着蒙蒙细雨，到处湿漉漉的。

Footage shows another swan also rushing over before they both start aggressively pecking at the swimmer and flapping their wings at him.

视频显示，随后另一只天鹅也冲了过来，它们开始猛啄这名男子，还扇着翅膀狠狠地拍打他。

Everything that was Tim was flapping his wings.

提姆在全身心地拍打着翅膀。

Within a minute, my kite was rocketing to the sky. It made a sound like a paper bird flapping its wings.

不消一分钟，我的风筝扶摇直上，发出宛如鸟儿扑打翅膀的声音。

Instead, researchers are using natural biological designs, such as flapping wings, to provide lift, thrust, and stability in one structural package.

相反，研究人员正在使用自然生物学的设计，例如，在一个结构组件包中，利用拍动的翅膀提供上升力，推力，以及稳定性。

The important thing to know about Mrs Watanabe is that, temporarily at least, she has all but stopped flapping her wings.

对于渡边夫人，你需要知道的重要一点是，她几乎停止了煽动翅膀至少暂时是这样。

Aurelia Lamp by Qis Design. "It has two knobs on the main body, the front one for adjusting brightness and the back for adjusting lighting angles, imitating a seagull flapping wings to soar into the sky."

Qis Design设计的水母灯：“这款的的两端各有一个旋钮，前面那个可以调节灯光亮度，后面那个可以调节照明角度，外形则模仿了一只振翅冲向天空的海鸥。”

There are beasts flapping their wings.

野兽们拍打着翅膀。

Almost everyone is now familiar with the metaphor of the butterfly whose flapping wings provoke a tornado weeks later, thousands of miles away.

现在，几乎人人都熟悉这个比喻：蝴蝶轻拍一下翅膀，几周后能在几千英里之外引发龙卷风。

Attitude Control Based on Neural Networks for Micro Aerial Vehicle with Flapping Wings

基于神经网络的拍翅式微型飞行器姿态控制

For attitude control of micro aerial vehicle with flapping wings, a control method based on BP ( backpropagation) neural networks and average moments is proposed.

对于拍翅式微型飞行器姿态的控制，提出了一个基于BP神经网络和平均力矩的控制方案。

Pinocchio, by Carlo Collodi.At this signal, there was a rustling as of flapping of wings.

“小木偶”，卡罗寇罗帝的作品.打过信号后有鼓动翅膀的声音

We could be that butterfly flapping its wings, don't you think?

我们或许就可以成为那只扇动翅膀大蝴蝶，你觉得呢？

When you watch a movie and you see a bird flapping its wings...

看电影的时候你看到一只鸟在拍打着它的翅膀…

Is every bird flapping its wings at the exact same frequency?

每只鸟会以同样的频率扇动翅膀吗？

Investigation of Flapping Wings Lift Characteristics by Unsteady Vortex-Lattice Method

扑翼升力特性的非定常涡格法计算研究

Combined with blade element theory, the results can be used to evaluate aerodynamic characteristics of flapping wings, which are helpful for the initial design of micro rotary and flapping wing.

运用本文方法分析了各参数对翼型气动特性的影响，进一步结合叶素理论还可以估算扑翼的气动特性，进而指导微旋翼或扑翼微型飞行器的初期设计。

Both insects have complex flight mechanisms with major muscles in the thorax, the chest region, which power the flapping of wings.

这两种昆虫的飞行机理比较复杂，胸部长有较多肌肉，这样它们才能有力量振动翅膀。

The unsteady aerodynamics and the unsteady high-lift mechanisms applied in flapping wings are introduced.

介绍了用于拍动翼的非定常空气动力特性和高升力机理。