维持

我们要维持良好的合作关系。

Wǒmen yào wéichí liánghǎo de hézuò guānxi.

We need to maintain good business relations.

他靠打工来维持生活。

Tā kào dǎgōng lái wéichí shēnghuó.

He works to support his needs.

维持秩序是警察的职责。

Wéichí zhìxù shì jǐngchá de zhízé.

Maintaining order is the duty of the police.