The circumstances based on which the contract is signed are changed so much so that the contract can't be carried out, and both parties wont reach any agreement upon modifying the contract.

本合同订立时所依据的客观情况发生重大变化，致使本合同无法履行，甲乙双方不能就变更本合同达成协议的。

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For these reasons among many others (including the opportunity to secure systemic UN reform, the need to get to the bottom of the Oil-for-Food scandal, etc.), we call upon you, if possible, to reach prompt agreement with the bipartisan Senate leadership to enable a final vote on John Bolton's nomination before the August recess.

CENTERFORSECURITYPOLICY: Orgs oppose 'globotaxes,' give Bolton recess appt

And far from dallying, the Fund has been in constant dialogue with the government during much of the last year, and even since the default on Brady bonds in September has offered financial support, provided Ecuador carried out agreed-upon policy measures and was making good-faith efforts to reach a collaborative agreement with its creditors.

ECONOMIST: Letters