这是隆重的黑蝴蝶结盛会，赴会者均须穿著特别庄重的服装。

This is a black-tie event. People have to wear special formal clothes.

youdao

这是隆重的黑蝴蝶结盛会，赴会者均须穿著特别庄重的服装。

This is a black-tie event. People have to wear special formal clothes.

youdao