以下是關於蝴蝶的英文短句：
A larva metamorphoses into a chrysalis and then into a butterfly. 幼蟲變為蛹，然後再變成蝴蝶。
A caterpillar is the larva of a butterfly. 毛蟲是蝴蝶的幼體。
The pupa is at an intermediate stage of development; it is intermediate between the egg and the adult butterfly. 蛹是蝴蝶發育的中間階段，介於卵和成蟲之間。
The butterfly fluttered from leaf to leaf. 蝴蝶在葉間翩飛。
A butterfly disported itself among the flowers. 蝴蝶在花間嬉戲。
A butterfly, a most beautiful insect, is wonderful. 蝴蝶是一種非常美麗的昆蟲。
Boys and girls love butterflies. 男孩和女孩都喜歡蝴蝶。
The butterfly is not only beautiful, but also an important part of our world. 蝴蝶不僅美麗，也是我們世界的重要組成部分。
這些句子提供了關於蝴蝶的基本信息，包括它們的生命周期、外觀特徵以及在自然界中的地位。