2 sentences

1. 孩子们在操场上大喊大叫。

   hái​zi men zài cāo​chǎng shàng dà​hǎn​dà​jiào.

   The children are shouting and screaming on the playground.

   Source: Dong Chinese Dictionary

2. 他们在报刊上为这个项目大喊大叫，试图博取公众的关注。

   tā​men zài bào​kān shàng wèi zhè​ge xiàng​mù dà​hǎn​dà​jiào, shì​tú bó​qǔ gōng​zhòng de guān​zhù.

   They are making a lot of noise about this project in the newspapers, trying to win public attention.

   Source: Dong Chinese Dictionary