butterflies

英 [ˈbʌtəflaɪz]

美 [ˈbʌtərˌflaɪz]

n. 蝴蝶; 蝶泳
butterfly的第三人称单数和复数

柯林斯词典

蝴蝶
Abutterflyis an insect with large colourful wings and a thin body.
蝶泳
Butterflyis a swimming stroke which you do lying on your front, kicking your legs and bringing your arms over your head together.
PHRASE 情绪紧张；心慌意乱；忐忑不安
If you havebutterflies inyourstomachor havebutterflies, you are very nervous or excited about something.
1. An exam, or even an exciting social event may produce butterflies in the stomach.
  一场考试，甚至是一次令人兴奋的社会活动，都有可能让人心里发慌。