The party requires formal dress.

参加这个晚会要穿礼服。

youdao

The occasion requires formal dress.

这一场合要求穿礼服。

youdao

Come in formal dress.

穿着正式服装来。

youdao

The result is a powerful portrait of a bearded man in formal Arabic dress.

VOA: standard.2010.07.30

Combining the two enabled owners to survive society's casual and formal dress codes with a single watch.

WSJ: This Sporting Life

He pointed out ancient photos of Kashmiris in formal dress and showed us black-and-white images printed on silver gelatine paper.

BBC: The man in the white tunic

At the royal wedding on April 29, Prince Alwaleed wore traditional Saudi formal dress, while Princess Ameerah donned a stunning tan lace dress with a stylish hat.

FORBES: More Royals At The Royal Wedding: Saudi Prince Alwaleed And Princess Ameerah