违约责任（liability for breach of contract），即违反合同的民事责任，也就是合同当事人因违反合同义务所承担的责任。

金钱债务的违约责任：

当事人一方未支付价款或者报酬的，对方可以要求其支付价款或者报酬。

If a party fails to pay the price or remuneration, the other party may request it to make the payment.

非金钱债务的违约责任：

当事人一方不履行非金钱债务或者履行非金钱债务不符合约定的，对方可以要求履行，但有下列情形之一的除外：

Where a party fails to perform the non-monetary obligations or its performance of non-monetary obligations fails to satisfy the terms of the contract, the other party may request it to perform it except under any of the following circumstances:

（一）法律上或者事实上不能履行；

it is unable to be performed in law or in fact;

（二）债务的标的不适于强制履行或者履行费用过高；

the subject matter of the obligation is unfit for compulsory performance or the performance expenses are excessively high;

（三）债权人在合理期限内未要求履行。

the obligee does not require performance within a reasonable time.

参考双语例句：

Changes in subject matter, quantity, quality, pri ce or remuneration, time, place and method of per‐ formance, liabilities for breach of contract  o r method of dispute resolution, among others, are d eemed “material changes” to the terms of the offer.

有关合同标的、数量、质量、价款或者报酬、履行期限、履行地点和方式、违约责任和解决争议方法等的变更，是对要约内容的实质性变更。

We will not (subject only to the exclusion provisions below) be liable to you, whether for negligence, breach of contract or otherwise, for any loss or damage of whatsoever nature suffered by you (including, without limitation, direct loss or damage, indirect or consequential loss or damage, loss of goodwill, loss of business opportunity, loss of data or loss of profit), arising from: any computer virus or other bug transmitted through the CVC Website; your use or inability to use the CVC Website at any time and any error in the provision of the CVC Website; your use of or reliance on other websites to which you have gained access by means of hyperlinks published on the CVC Website; any inaccurate information published on the CVC Website; your failure to comply with any laws or regulations that are applicable to you; or your reliance on any information published on the CVC Website.

如果由于以下原因阁下出现了重大疏忽、违约或其他事宜，并遭受了任何性质的损失或损害(其中包括但不限于直接损失或损害、间接或后续损失或损害、商誉损失、商业机会丧失、数据丢失或利润损失等)，则公司不就此向阁下承担任何责任(除非下文另有规定)：通过CVC网站感染了任何电脑病毒或其他漏洞；阁下在任何时间使用或因CVC网站出现任何错误而不能使用CVC网站；阁下通过CVC网站中提供的超级链接访问任何其他网站，并使用或依赖该等网站中的内容；CVC网站中公布的任何信息不准确；阁下未能遵守适用发法律法规的要求；或阁下依赖CVC网站中公布的任何信息。