3 sentences

1. 语言是人类思想交流的媒介。

   yǔ​yán shì rén​lèi sī​xiǎng jiāo​liú de méi​jiè.

   Language is a medium for the exchange of human thoughts.

   Source: Dong Chinese Dictionary

2. 蚊子是传播疟疾等传染病的主要媒介。

   wén​zi shì chuán​bō nüè​jí děng chuán​rǎn​bìng de zhǔ​yào méi​jiè.

   Mosquitoes are the primary vectors for transmitting infectious diseases like malaria.

   Source: Dong Chinese Dictionary

3. 这起事件引起了大众媒介的广泛关注。

   zhè qǐ shì​jiàn yǐn​qǐ le dà​zhòng méi​jiè de guǎng​fàn guān​zhù.

   This incident has attracted widespread attention from the mass media.

   Source: Dong Chinese Dictionary