中国的西北地区冬天很冷，风也很大。

Zhōngguó de xīběi dìqū dōngtiān hěn lěng, fēng yě hěn dà.

In northwest China, winters are very cold and very windy.

我们学校在城市的西北。

Wǒmen xuéxiào zài chéngshì de xīběi.

Our school is in the northwest of the city.

西北的冬天风大，人很少出门。

Xīběi de dōngtiān fēng dà, rén hěn shǎo chūmén.

In winter in the northwest, the wind is strong and people rarely go out.