4 sentences

1. 他们各不相同。

   tā​men gè​bù​xiāng​tóng.

   They are all different.

   Source: OpenSubtitles

2. 我们都有不同的经历，因此所了解的事物各不相同。

   wǒ​men dōu yǒu bù​tóng de jīng​lì, yīn​cǐ suǒ liǎo​jiě de shì​wù gè​bù​xiāng​tóng.

   We all have different experiences and, as a result, know different things.

   Source: CCMatrix

3. 阿拉伯语的口语形式各不相同，每个阿拉伯国家都有自己的方言。

   ā​lā​bó​yǔ de kǒu​yǔ xíng​shì gè​bù​xiāng​tóng, měi​gè ā​lā​bó guó​jiā dōu yǒu zì​jǐ de fāng​yán.

   The spoken forms of Arabic vary and each Arab country has its own dialect.

   Source: CCMatrix

4. 世界最古老大学的名单各不相同，这取决于人们如何对大学作出定义。

   shì​jiè zuì gǔ​lǎo dà​xué de míng​dān gè​bù​xiāng​tóng, zhè qǔ​jué​yú rén​men rú​hé duì dà​xué zuò​chū dìng​yì.

   The list of the oldest universities in the world varies, depending on how one defines a university.

   Source: CCMatrix