butterfly复数是butterflies。butterfly主要用作名词与动词，作名词时意为：蝴蝶; 蝶泳;举止轻浮的人;追求享乐的人。作动词时意为：切开摊平。

例句：

Two boys were chasing butterflies in a beautiful meadow.

两个小男孩在美丽的草地上追逐蝴蝶。

Butterflies are fluttering among the flowers.

蝴蝶在花丛中翩翩飞舞。

Merian started raising insects at home, mostly butterflies and caterpillars.

梅里安开始在家里养昆虫，主要是蝴蝶和毛毛虫。