1. 蝴蝶
A butterfly is an insect with large colourful wings and a thin body.

2. 蝶泳
Butterfly is a swimming stroke which you do lying on your front, kicking your legs and bringing your arms over your head together.

3. 情绪紧张；心慌意乱；忐忑不安
If you have butterflies in your stomach or have butterflies, you are very nervous or excited about something.

1. a swimming stroke in which the arms are thrown forward together out of the water while the feet kick up and down

Synonym: butterfly stroke

2. diurnal insect typically having a slender body with knobbed antennae and broad colorful wings