4 sentences

1. 京津冀协同发展。

   Jīng Jīn Jì xié​tóng fā​zhǎn.

   The coordinated development of the Beijing-Tianjin-Hebei region.

   Source: Dong Chinese Dictionary

2. 这种协同作战的方式让敌人措手不及。

   zhè zhǒng xié​tóng zuò​zhàn de fāng​shì ràng dí​rén cuò​shǒu​bù​jí.

   This method of coordinated operation caught the enemy off guard.

   Source: Dong Chinese Dictionary

3. 同盟军协同作战，最终取得了那场战争的胜利。

   tóng​méng​jūn xié​tóng zuò​zhàn, zuì​zhōng qǔ​dé le nà cháng zhàn​zhēng de shèng​lì.

   The allied forces fought together and eventually won the war.

   Source: Dong Chinese Dictionary

4. 不同部门之间需要紧密协同，才能提高工作效率。

   bù​tóng bù​mén zhī​jiān xū​yào jǐn​mì xié​tóng, cái néng tí​gāo gōng​zuò xiào​lǜ.

   Close coordination between different departments is necessary to improve work efficiency.

   Source: Dong Chinese Dictionary