The butterfly fluttered from flower to flower.
蝴蝶在花丛中飞来飞去。
Caterpillars change into butterflies.
毛虫变成蝴蝶。
Butterfly is the only stroke I can't do.
只有蝶泳我不会。
She was third in the 200m butterfly.
她获得200米蝶泳比赛的第三名。
The caterpillar will eventually metamorphose into a butterfly.
毛毛虫最终将蜕变成一只蝴蝶。