"Butterfly" in Engpsh is pronounced [ˈbʌtərflaɪ].
The word "butterfly" comes from the Old Engpsh word "butter-fleoge", which means "butter-colored fly".
Examples:
The butterfly is flapping its wings.
(蝴蝶在拍动翅膀。)
The butterfly exhibit at the museum is stunning.
(博物馆里的蝴蝶展览令人惊叹。)
The caterpillar transformed into a beautiful butterfly.
(毛毛虫变成了一只美丽的蝴蝶。)