1.the contract comes into effect today， we can't go back on our word now.

合同已于今日生效，我們不能反悔了

2.Once the contract is approved by the Chinese government， it is legally binding upon both parties.

合同一經中國政府批準，對雙方就有了法律約束力。

3.We have to hold you to the contract.

我們不得不要求你們按合同辦事。

4.You must put their rights and interest into a contract.

你們必須把他們的權益訂在合同中。

5.We always carry out the terms o four contract to the letter and stand by what we say.

我們堅持重合同，守信用。

6.It's clearly a breach of contract.

這顯然是違反了合同。

7.Any deviation from the contract will be unfavourable.

任何違反合同之事都是不利的。

8.The buyer has the option of canceling the contract.

買主有權撤消合同。

9.You have no grounds for backing out of the contract.

你們沒有正當理由背棄合同。

10.In case one party fails to carry out the contract， the other party is entitled to cancel the contract.

如果一方不執行合同，另一方有權撤消該合同。

11.Are you worrying about the non-execution of the contract and non-payment on our part？

你是否擔心我們不履行合同或者拒不付款？

12.this contract will come into force as soon as it signed by two parties

該合同一經雙方簽字就生效