蝴蝶结的英文是 "butterfly knot" 或 "butterfly bow"。这种结的来源可能源自结在丝带上的形状类似蝴蝶的翅膀。下面是一些英文例句：

She tied her hair with a butterfly knot.

He learned how to make a butterfly bow for his girlfriend.

The butterfly knot is a popular way to add a decorative touch to a gift.