have butterflies in your stomach
US /hæv ˈbʌt.ər.flaɪz ɪn jʊər ˈstʌm.ək/
UK /hæv ˈbʌt.ər.flaɪz ɪn jʊər ˈstʌm.ək/

1.
感到紧张, 心神不宁
to feel very nervous or excited about something
:
•
I always have butterflies in my stomach before a big presentation.
每次大型演讲前我都会感到紧张。
•
She had butterflies in her stomach on her wedding day.
她在婚礼当天感到紧张。