我们班有三十个学生，其中十个是留学生。

Wǒmen bān yǒu sānshí gè xuéshēng, qízhōng shí gè shì liúxuéshēng.

Our class has thirty students, of whom ten are international students.

她去过很多国家，其中最喜欢的是日本。

Tā qùguò hěn duō guójiā, qízhōng zuì xǐhuan de shì Rìběn.

She has been to many countries, and her favorite among them is Japan.

公司有五个部门，其中两个在海外。

Gōngsī yǒu wǔ gè bùmén, qízhōng liǎng gè zài hǎiwài.

The company has five departments, two of which are overseas.