flutter
单词辨析：
尤指心脏有规律地跳动，或指鸟类有节奏地拍打翅膀。
Her heart is beating fast.
她的心跳得很快。
The birds are beating their wings.
鸟儿扑扇着翅膀。
特指鸟儿或有翅膀的昆虫快速而轻轻地振动翅膀。
The young bird fluttered her wings up and down, hoping to fly.
小鸟上下拍动着翅膀，想要飞起来。
The bees are fluttering among the flowers.
蜜蜂在花丛中飞舞。
指激动、生气、愤怒等时心脏剧烈地跳动；也指使劲地连续击打。
His heart pounded with anger.
他气得心脏怦怦直跳。
He pounded the table angrily.
他气得猛拍桌子。
He was pounding on the door.
他在砰砰地敲门。
指心脏、动脉等有规律地振动或有节奏地舒张和收缩。
His heart pulsated with excitement.
他激动得心脏怦怦直跳。
She felt her heart pulsate with the aftershock.
她感觉自己的心在随着余震一起跳动。
We could see the veins in her neck pulsating.
我们看到她脖子上的血管在跳动。
指因恐惧或激动而心脏怦怦直跳。
His heart thumped with fear.
他吓得心怦怦直跳。
My heart began to thump wildly.
我的心开始狂跳起来。
相关例句：
We present a method of analyzing flutter characteristics of wing with nonlinear stiffness in supersonic flow.
提出了带结构刚度非线性的超音速弹翼的颤振分析方法。
The director's threat to resign caused a flutter of speculation among the shareholders.
该董事的辞职威胁在股东中引起了猜测。
She'd been fluttering about in the kitchen.
她一直在厨房里忙前忙后。
A direction derivative method for the analysis of the effects of asymmetric stores on flutter speed is presented.
提出了一种分析不对称外挂对飞机颤振影响的方向导数法。
The nonlinear flutter calculation demonstrates the validity of the presented method.
机翼的非线性颤振计算表明了方法的有效性。
Non-linear Dynamics and Control of Flutter of Airfoil
机翼颤振的非线性动力学和控制研究