面试的时候他穿了一套深蓝色的西装。

Miànshì de shíhou tā chuān le yī tào shēn lán sè de xīzhuāng.

He wore a dark blue suit to the interview.

这件西装是意大利品牌的，剪裁特别好。

Zhè jiàn xīzhuāng shì Yìdàlì pǐnpái de, jiǎncái tèbié hǎo.

This suit is an Italian brand with particularly fine tailoring.

你不用穿西装，今天的聚会很随意。

Nǐ bùyòng chuān xīzhuāng, jīntiān de jùhuì hěn suíyì.

You don't need to wear a suit; today's gathering is casual.