2 sentences

1. 今天翻译没来，我临时客串一下导游。

   jīn​tiān fān​yì méi lái, wǒ lín​shí kè​chuàn yī​xià dǎo​yóu.

   The translator didn't come today, so I'm filling in as a tour guide for now.

   Source: Dong Chinese Dictionary

2. 这位著名歌手在电影中客串了一个警察。

   zhè wèi zhù​míng gē​shǒu zài diàn​yǐng zhōng kè​chuàn le yī gè jǐng​chá.

   The famous singer made a cameo appearance as a police officer in the movie.

   Source: Dong Chinese Dictionary