The accuracy of modal parameter estimation plays a crucial role in flutter boundary prediction.

准确估计模态参数在飞机颤振边界的预测中具有重要意义。

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But across their surfaces, dragons writhe through mountains, bamboo leaves flutter in the moonlight and cranes soar through clouds.

FORBES: Art and Seoul

Everywhere you look, lines of colourful prayer flags flutter in the breeze and prayer wheels spin as the water flows beneath them.

BBC: The return of China��s wild panda

And when they occasionally broke the shackles with a foray forward they certainly caused the odd flutter in the Tottenham defence, their best effort of the first half coming when Michael Dawson did well to bravely block from Gretar Steinsson's shot.

BBC: Tottenham 1-0 Bolton