n. abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block
v. flap the wings rapidly or fly with flapping movements
n. 摆动, 鼓翼, 烦扰
vi. 摆动, 鼓翼, 烦扰
vt. 拍(翅), 使焦急
[计] 颤动
1. The butterfly began to flutter around the flowers.
蝴蝶开始在花丛中翩翩起舞。
2. She felt her heart flutter when she saw him.
她看到他时，心跳不禁加速。
3. The leaves fluttered gently in the breeze.
树叶在微风中轻轻摇曳。