他始终努力履行自己的承诺。

Tā shǐzhōng nǔlì lǚxíng zìjǐ de chéngnuò.

He always strives to fulfill his commitments.

合同规定双方必须履行约定的义务。

Hétong guīdìng shuāngfāng bìxū lǚxíng yuēdìng de yìwù.

The contract stipulates that both parties must fulfill the agreed-upon obligations.

作为员工，我们有责任履行公司的规章制度。

Zuòwéi yuángōng, wǒmen yǒu zérèn lǚxíng gōngsī de guīzhāng zhìdù.

As employees, we have a responsibility to adhere to the company's rules and regulations.