5 sentences

1. 武汉是中南地区的重要交通枢纽。

   Wǔ​hàn shì Zhōng Nán dì​qū de zhòng​yào jiāo​tōng shū​niǔ.

   Wuhan is an important transportation hub in the central-south region of China.

   Source: Dong Chinese Dictionary

2. 北京是全国最大的铁路交通枢纽。

   Běi​jīng shì quán guó zuì dà de tiě​lù jiāo​tōng shū​niǔ.

   Beijing is the largest railway transportation hub in the country.

   Source: Dong Chinese Dictionary

3. 这个码头是当地重要的水陆交通枢纽。

   zhè gè mǎ​tou shì dāng​dì zhòng​yào de shuǐ lù jiāo​tōng shū​niǔ.

   This pier is an important local hub for water and land transportation.

   Source: Dong Chinese Dictionary

4. 三峡大坝是世界上最大的水利枢纽工程。

   Sān​xiá dà​bà shì shì​jiè shàng zuì dà de shuǐ​lì shū​niǔ gōng​chéng.

   The Three Gorges Dam is the world's largest water conservation project.

   Source: Dong Chinese Dictionary

5. 这个连接处的枢纽已经磨损了。

   zhè gè lián​jiē​chù de shū​niǔ yǐ​jīng mó​sǔn le.

   The pivot at this connection has worn out.

   Source: Dong Chinese Dictionary