v. 振（翼），拍打（翅膀）
v. 〔在空中〕飘扬，飘动
v. 〔心脏或胃因激动或紧张而〕悸动，颤抖
n. 紧张；困惑；激动
in a flutter 紧张
a flutter of sth 一阵〔不太强烈的〕感觉
A small bird fluttered past the window. 一只小鸟拍打着翅膀飞过窗前。
The flag fluttered in the light breeze. 旗帜在微风中飘动。
She was all in a flutter. 她浑身紧张。
BrE /əˌbriːviˈeɪʃn/