他是一名专业运动员。

Tā shì yì míng zhuānyè yùndòngyuán.

He is a professional athlete.

我们为客人提供专业的服务。

Wǒmen wèi kèrén tígōng zhuānyè de fúwù.

We provide professional service to our customers.

这里的老师都很专业。

Zhèlǐ de lǎoshī dōu hěn zhuānyè.

The teachers here are all very professional.