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》

She swims like a butterfly.

她像只蝴蝶那样游泳。

youdao

You've got to be like a butterfly and have a metamorphosis.

你要像蝴蝶，来一次蜕变。

youdao

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

VOA: special.2011.04.19

She remembers that she did. "I think like many of the children in our world, I got interested in science just from having a butterfly net and from having a few strainers and some boots and going down to the streams and creeks and being out in the fields."

VOA: standard.2010.03.29

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

WSJ: Economics, Sliced

The currency high-roller: Float like a butterfly with the euro and drop like a stone with the pound!

ECONOMIST: Explore a clickable map of The Economist's new theme park

The movie is like a butterfly half out of its cocoon, emerging with many fond looks back to the protective walls.

NEWYORKER: Cold Weather