5 sentences

1. 他在那家音乐电台担任主持人。

   tā zài nà jiā yīn​yuè diàn​tái dān​rèn zhǔ​chí​rén.

   He works as a host at that music radio station.

   Source: Dong Chinese Dictionary

2. 主持人正在演播室里准备录制节目。

   zhǔ​chí​rén zhèng​zài yǎn​bō​shì lǐ zhǔn​bèi lù​zhì jié​mù.

   The host is in the studio preparing to record a program.

   Source: Dong Chinese Dictionary

3. 她是一位非常有经验的电视节目主持人。

   tā shì yī wèi fēi​cháng yǒu jīng​yàn de diàn​shì jié​mù zhǔ​chí​rén.

   She is a very experienced TV host.

   Source: Dong Chinese Dictionary

4. 大山是中国最有名的外国电视节目主持人之一。

   Dà​shān shì Zhōng​guó zuì yǒu​míng de wài​guó diàn​shì jié​mù zhǔ​chí​rén zhī​yī.

   Dashan is one of the most famous foreign television presenters in China.

   Source: Dong Chinese Dictionary

5. 张教授是这项国家级科研项目的主持人。

   Zhāng jiào​shòu shì zhè xiàng guó​jiā​jí kē​yán xiàng​mù de zhǔ​chí​rén.

   Professor Zhang is the principal investigator of this national research project.

   Source: Dong Chinese Dictionary