学校在城市的西南方向。

Xuéxiào zài chéngshì de xīnán fāngxiàng.

The school is in the southwest part of the city.

他家在城里的西南角。

Tā jiā zài chénglǐ de xīnánjiǎo.

His home is in the southwest corner of the city.

中国的西南有很多高山。

Zhōngguó de xīnán yǒu hěnduō gāoshān.

There are many high mountains in the southwest of China.