2 sentences

1. 郑和下西洋是中国航海史上的壮举。

   Zhèng Hé xià Xī​yáng shì Zhōng​guó háng​hǎi​shǐ shàng de zhuàng​jǔ.

   Zheng He's voyages to the Western Oceans were a great feat in Chinese maritime history.

   Source: Dong Chinese Dictionary

2. 郑和下西洋时，曾将长颈鹿作为麒麟进献给皇帝。

   Zhèng Hé xià Xī​yáng shí, céng jiāng cháng​jǐng​lù zuò​wéi qí​lín jìn xiàn​gěi huáng​dì.

   During Zheng He's voyages, he presented a giraffe to the emperor as a qilin.

   Source: Dong Chinese Dictionary