sth flutters in/on sth
不及物用法,表示物体轻快而不规则地摆动,常接 in、on 等地点或环境状语。
The flags fluttered in the wind.
旗帜在风中飘动。
振翅；轻快地飞
fluttered — past of flutter
飘动；摆动；扑动；使扑动；使摆动；心神不宁；紧张不安；使慌乱；扰乱；（航空）颤振；发生气动弹性颤振
Of a bird or insect, to fly or move through the air with quick, light beats of the wings.
快速但不规则地拍动或挥动
To flap or wave quickly but irregularly.
有翼动物:拍动翅膀而不飞行；轻拍翅膀飞行
Of a winged animal: to flap the wings without flying; to fly with a light flapping of the wings.
由于弹性变形和空气动力之间的正反馈循环而导致的发散振动(可能导致结构失效)
To undergo divergent oscillations (potentially to the point of causing structural failure) due to a positive feedback loop between elastic deformation and aerodynamic forces.
使某物拍动
To cause something to flap.
使混乱；使困惑
To drive into disorder; to throw into confusion.
处于激动或不确定状态
To be in a state of agitation or uncertainty.
一般现在时
She flutters her eyelashes to attract attention.
她眨动睫毛以吸引注意。
一般过去时
The bird fluttered its wings and flew away.
那只鸟拍动翅膀飞走了。
现在进行时
The leaves are fluttering in the gentle breeze.
树叶在微风中飘动。
规则动词，加-ed/-ing/-s构成变化形式。
The butterfly flutters its wings rapidly to stay aloft.
蝴蝶快速摆动翅膀以保持在空中。
用法提示：本句中flutter作动词，意为快速摆动，描述蝴蝶翅膀的动作。
The flags fluttered gently in the breeze during the ceremony.
仪式期间，旗帜在微风中轻轻摆动。
用法提示：本句中fluttered是flutter的过去式，表示旗帜因风而摆动。
She felt her heart flutter with excitement as she opened the gift.
打开礼物时，她感到心脏因兴奋而悸动。
用法提示：本句中flutter作动词，描述心脏因情感而快速跳动。
不及物用法,表示物体轻快而不规则地摆动,常接 in、on 等地点或环境状语。
The flags fluttered in the wind.
旗帜在风中飘动。
与表方向的副词或介词短语连用,表示轻快地飞动或移动。
A butterfly fluttered past the window.
一只蝴蝶从窗前翩翩飞过。
及物用法,表示使翅膀等快速拍动;也可说 flutter one's eyelashes 表示眨眼睛。
The bird fluttered its wings.
那只鸟扑动着翅膀。
比 flutter 更用力、动作幅度更大，多用于翅膀或片状物体，常强调明显的上下拍动。
wave 多指有方向感的来回运动（如挥手、旗帜招展），flutter 则更零碎、更快且不规则。
quiver 强调轻微而快速的颤抖，常由情绪或紧张引发；flutter 不强调原因，多表轻盈凌乱的晃动。
tremble 比 quiver 更强烈，常由恐惧、寒冷等引起，幅度更大；flutter 更轻巧，不带强烈情绪色彩。
ripple 尤其用于水面或类似表面，指小片状起伏；flutter 常指空中或轻薄物体的快速摆动，搭配不同。
grammar · medium
易错句子The flag fluttered on the wind.
正确表达The flag fluttered in the wind.
汉语的'在'可对应英语的 in、on、at，学习者容易误选 on；表示'在风中（随风摆动）'这一环境时，英语固定用介词 in（in the wind / in the breeze），而 on 表示接触某个表面，不能表示流动的空气。
grammar · medium
易错句子Look, the butterfly flutters its wings.
正确表达Look, the butterfly is fluttering its wings.
汉语动词没有时态形式变化，学习者常直接用一般现在时表示眼前正在发生的动作；一般现在时表示习惯或常态，要表示说话这一刻正在进行的动作必须用现在进行时 be + 现在分词，故用 is fluttering。
grammar · medium
易错句子The bird fluttered its wing and flew away.
正确表达The bird fluttered its wings and flew away.
汉语名词没有单复数标记，学习者常漏掉表示成对器官的 -s；鸟有两只翅膀，拍动的是双翅，英语中成对的部位习惯用复数 wings，故用 its wings。
与‘flutter’的“快速不规则移动或拍动”义相对，指停止飘荡、归于静止。
动词义指保持不动，直接反对‘flutter’所表示的连续轻微运动。
作为动词，表示使不再拍动或晃动；与‘flutter’的动态形成对立。
flap 指幅度较大、常带声响的拍动，往往是有意或用力发出；flutter 指快速、轻微、不规则的颤动或振翅。
flicker 多用于光、火焰或影像，指忽明忽暗或微微颤抖；flutter 指在空气中快速轻微地摆动，常与翅膀、旗帜或心脏有关。
flit 强调从一个地方快速移动到另一个地方，有方向性；flutter 强调在原地或小范围内快速振动、飘动，不强调移动路径。
拍动翅膀（昆虫或鸟扇动翅膀）
The hummingbird fluttered its wings rapidly as it hovered by the flower.
蜂鸟在花旁盘旋时快速地拍动着翅膀。
在微风中飘动
Colorful flags fluttered in the breeze outside the stadium.
体育场外五颜六色的旗帜在微风中飘动。
飘落到地面
Dry leaves fluttered to the ground one by one in the autumn wind.
秋风中，枯叶一片一片地飘落到地面。
坐立不安地走动；忙乱地转来转去
The hostess fluttered about the kitchen, checking every dish before the guests arrived.
女主人坐立不安地在厨房里走动，在客人到来前检查每一道菜。
眨动睫毛（以吸引注意）
She fluttered her eyelashes at him and smiled.
她朝他眨动着睫毛，微笑了一下。
utter
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flutter 常用来描述鸟或昆虫快速而不规则地拍动翅膀的动作。
鸟飞行时靠翅膀产生的拍动感可用 flutter 形容。
蝴蝶飞翔时翅膀的轻快振动是 flutter 的典型例子。
风吹树叶时轻快飘摆的状态也可以用 flutter 表示。
旗帜在风中快速飘动的样子常用 flutter 来描绘。
紧张兴奋；心慌意乱
She was all of a flutter before her interview.
面试前她紧张兴奋，心慌意乱。
小赌一番；下小赌注
He likes to have a flutter on the horses.
他喜欢在赛马上下小赌注。
（向某人）眨巴眼睛示好；抛媚眼
She fluttered her eyelashes at him and smiled.
她朝他眨巴眼睛，笑了一下。
在微风中摇曳起舞。
A famous line from William Wordsworth's poem 'I Wandered Lonely as a Cloud' (often called 'Daffodils'). The poet sees a field of golden daffodils moving in the wind, and the memory later cheers him.
出自威廉·华兹华斯的诗作《我孤独地漫游，像一朵云》（常称《水仙》）。诗人看见一片金色水仙花在风中摇曳，日后回忆起来仍让他心中欢喜。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY, WORDNET.