履约

tā men wèi lǚ yuē lì jí huán zhài

他们未履约立即还债。

They failed to fulfill their promise to repay the debt promptly.

wǒ yǐ jīng lǚ yuē xī wàng nǐ yě néng zūn shǒu yuē dìng

我已经履约，希望你也能遵守约定。

I've done what I promised and I expect you to keep your side of the bargain.

tā méi yǒu lǚ yuē

他没有履约。

He failed to keep the appointment.