The right to cancel a contract obtained by agreement differs from that by provisions of law.

合同解除权产生的情形因约定和法定解除权的不同而不同。

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In France the law makes void any attempt to override the contracting authority's ability to unilaterally cancel a contract.

在法国，法律不允许任何凌驾于行政机关可以单方面取消合同的权利之上的做法。

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A spokesman for O2 said the company is not planning to offer disgruntled users a better deal in order to convince them not to cancel their contract.

O2电信的一名发言人称，公司不打算给不满的用户提供更优惠的选择，这样做是为了说服他们，不主动取消自己的合同。

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If you cancel a contract and no money changes hands, do you have taxable income?

FORBES: Contract Cancellations Trigger Taxes

And, of course, the Pentagon can cancel a contract if it is not fulfilled.

ECONOMIST: An unregulated and unsupervised semi-covert world

It is true that the Pentagon can cancel a contract, but as Defence Department officials admit, problems exist with the Pentagon's own oversight: they have little experience in supervising their new subcontractors.

ECONOMIST: Private security firms in Iraq: Dangerous work | The