to move quickly and lightly
The flag began to flutter in the wind.
旗帜开始在风中飘扬。
to move wings quickly up and down
The bird's wings flutter as it takes off.
鸟儿起飞时翅膀快速扇动。
to fly with quick wing movements
The butterfly will flutter around the garden.
蝴蝶会在花园里翩翩飞舞。
to beat quickly and unevenly
His heart started to flutter with nervousness.
他因紧张而心跳加速。
a quick, light movement
A gentle flutter of leaves fell from the tree.
树叶轻轻飘落下来。
a small bet
He placed a flutter on the game.
他在比赛上下了一个小赌注。
a state of nervous excitement
She was in a flutter before her speech.
她在演讲前处于紧张兴奋的状态。
a fast, uneven heartbeat
A sudden flutter made her catch her breath.
突然的心悸让她屏住了呼吸。
an unsteady heartbeat condition
The doctor detected a flutter during the checkup.
医生在检查时检测到心律不齐。
rapid changes in sound pitch or volume
The recording had a noticeable flutter in the audio.
录音中的音频有明显的颤动。