The caterpillar will eventually metamorphose into a butterfly.

毛毛虫最终将蜕变成一只蝴蝶。

《牛津词典》

She's like a butterfly. She flits in and out of people's lives.

她像一只蝴蝶，每天在人前人后飞来飞去。

《牛津词典》

The kittens see a butterfly.

小猫们看到了一只蝴蝶。

youdao

The bottom of the root ball will look something like the spread-open wings of a butterfly.

VOA: special.2011.04.19

The butterfly is the perfect work of art because it is both a representation and alive. It has eyes on its wings.

这只蝴蝶是一个完美的艺术作品,因为它不但是画像，也是,鲜活的，它的翅膀上有眼睛。

耶鲁公开课 - 1945年后的美国小说课程节选

And the butterfly does appear in just one moment, and it's during the tennis scene. As Humbert and Lolita play, there is one butterfly that flits between them. It's a mark of their equality as artists in that moment.

那蝴蝶曾经在短短的一瞬出现过，那是,在那个打网球的场景里，当亨伯特和洛丽塔打球的时候，一只,蝴蝶从他们中间飞过，它标志着他们在那个时刻是艺术家。

耶鲁公开课 - 1945年后的美国小说课程节选

Like sitting on the back of a butterfly is how someone described flying the plane.

BBC: The other pilot

"It's like a butterfly going back into the cocoon and becoming a caterpillar again, " he said.

WSJ: Economics, Sliced

Sometimes all it takes is one more flap of a butterfly wing to unhinge the unstable worker.

FORBES: Change During Tough Economic Times Can Kill