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

　　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。

　　We have to hold you to the contract.

　　我們不得不要求你們按合同辦事。

　　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。

　　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。

　　It's clearly a breach of contract.

　　這顯然是違反了合同。

　　Any deviation from the contract will be unfavourable.

　　任何違反合同之事都是不利的。

　　The buyer has the option of canceling the contract.

　　買主有權撤消合同。

　　You have no grounds for backing out of the contract.

　　你們沒有正當理由背棄合同。

　　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。

　　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?

　　You cannot cancel the contract without first securing our agreement.

　　如果沒有事先征得我們同意，你們不能取消合同。

　　This contract will come into force as soon as it is signed by two parties.

　　合同一經雙方簽定即生效。

　　Once a contract is made, it must be strictly implemented.

　　合同一旦確定就應嚴格執行。

　　Words and Phrases

R>
　to bring a contract into effect 使合同生效

　　to come into effect 生效

　　to go (enter)into force 生效

　　to cease to be in effect/force 失效

　　to carry out a contract 執行合同

　　to execute/implement/fulfil/perform a contract 執行合同

　　cancellation of contract 撤消合同

　　breach of contract 違反合同

　　to break the contract 毀約

　　to cancel the contract 撤消合同

　　to tear up the contract 撕毀合同

　　to approve the contract 審批合同

　　to honour the contract 重合同

　　to annual the contract 廢除合同

　　to terminate the contract 解除合同

　　to alter the contract 修改合同

　　to abide by the contract 遵守合同

　　to go back on one's words 反悔

　　to be legally binding 受法律約束

　　to stand by 遵守

　　non-payment 拒不付款

　　to secure one's agreement 征得...的同意

　　Additional Words and Phrases

　　contract price 合約價格

　　contract wages 合同工資

　　contract note 買賣合同(證書)

　　contract of employment 雇傭合同

　　contract of engagement 雇傭合同

　　contract of carriage 運輸合同

　　contract of arbitration 仲裁合同

　　contract for goods 訂貨合同

　　contract for purchase 采購合同

　　contract for service 勞務合同

contract for future delivery 期貨合同

　　contract of sale 銷售合同

　　contract of insurance 保險合同

　　contract sales 訂約銷售

　　contract law 合同法

　　to ship a contract 裝運合同的貨物

　　contractual dispute 合同上的爭議

　　a long-term contract 長期合同

　　a short-term contract 短期合同

　　contract parties 合同當事人

　　contractual practice/usage 合同慣例

　　contractual claim 根據合同的債權

　　contractual liability/obligation 合同規定的義務

　　contractual income 合同收入

　　contractual specifications 合同規定

　　contractual terms & conditions 合同條款和條件

　　contractual guarantee 合同規定的擔保

　　contractual damage 合同引起的損害

　　contractual-joint-venture 合作經營，契約式聯合經營

　　completion of contract 完成合同

　　execution of contract 履行合同

　　performance of contract 履行合同

　　interpretation of contract 解釋合同

　　expiration of contract 合同期滿

　　renewal of contract 合同的續訂