我们班的同学来自不同的国家和民族。

Wǒmen bān de tóngxué láizì bùtóng de guójiā hé mínzú.

The students in our class come from different countries and ethnic groups.

他是少数民族，所以会说两种语言。

Tā shì shǎoshù mínzú, suǒyǐ huì shuō liǎng zhǒng yǔyán.

He is from an ethnic minority, so he can speak two languages.