我们签署了一份新的契约。
wǒmen qiānshǔ le yīfèn xīnde qìyuē 。
We signed a new contract.
这个契约需要双方的同意。
zhègè qìyuē xūyào shuāngfāng de tóngyì 。
This contract requires the agreement of both parties.
他没有遵守契约，导致了纠纷。
tā méiyǒu zūnshǒu qìyuē ， dǎozhì le jiūfēn 。
He did not adhere to the contract, which led to a dispute.