Evening dress is de rigueur at the casino.

按照习俗在赌场要穿晚礼服。

Everyone was in evening dress.

人人都身着晚礼服。

He wore formal evening dress.

他穿了正式的晚礼服。

Abby pointed out a peacock blue evening dress.

艾比指着一件蓝孔雀的晚礼服。

How about this black evening dress?

这件黑色的晚礼服怎么样？