The passengers granted the request with alacrity, and straightaway disappeared on the platform.
旅客们听了这话吓了一跳,但是他们很乐意帮这两位先生的忙, 于是都走出车厢,站到车桥上去了.
I am a boy of extrovert with bright alacrity.
He accepted with alacrity.
He accepted her offer with alacrity.
Although the man was very old, he still moved with alacrity.