3 sentences

1. 这不是一个岛屿。

   zhè bù shì yī gè dǎo​yǔ.

   This is not an island.

   Source: OpenSubtitles

2. 这片海域分布着许多美丽的岛屿。

   zhè piàn hǎi​yù fēn​bù zhe xǔ​duō měi​lì de dǎo​yǔ.

   There are many beautiful islands scattered across this sea.

   Source: Dong Chinese Dictionary

3. 印度尼西亚有很多美丽的岛屿，是著名的旅游胜地。

   Yìn​dù​ní​xī​yà yǒu hěn​duō měi​lì de dǎo​yǔ, shì zhù​míng de lǚ​yóu​shèng​dì.

   Indonesia has many beautiful islands and is a famous tourist destination.

   Source: Dong Chinese Dictionary