航空公司免费把我们升级到商务舱。

Hángkōng gōngsī miǎnfèi bǎ wǒmen shēngjí dào shāngwùcāng.

The airline upgraded us to business class for free.

我在一家大型商务公司工作。

Wǒ zài yījiā dàxíng shāngwù gōngsī gōngzuò.

I work in a large business company.

我们进行了一次重要的商务会议。

Wǒmen jìnxíngle yīcì zhòngyào shāngwù huìyì.

We had an important business meeting.