4 sentences

1. 这个汽车座椅非常舒适。

   zhè gè qì​chē zuò​yǐ fēi​cháng shū​shì.

   This car seat is very comfortable.

   Source: Dong Chinese Dictionary

2. 这个按钮可以控制座椅的升降。

   zhè gè àn​niǔ kě​yǐ kòng​zhì zuò​yǐ de shēng​jiàng.

   This button controls the raising and lowering of the seat.

   Source: Dong Chinese Dictionary

3. 你可以通过调节手柄来升高座椅。

   nǐ kě​yǐ tōng​guò tiáo​jié shǒu​bǐng lái shēng​gāo zuò​yǐ.

   You can raise the seat by adjusting the lever.

   Source: Dong Chinese Dictionary

4. 他的自行车后座上安装了一个儿童座椅。

   tā de zì​xíng​chē hòu​zuò shàng ān​zhuāng le yī gè ér​tóng zuò​yǐ.

   A child seat was installed on the back rack of his bicycle.

   Source: Dong Chinese Dictionary