As one of the principles in the law, circumstance modification principle exists extensively in contract law throughout the world.

情事变更原则作为一项法律原则广泛存在于世界各国合同法中。

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The principle of the change of circumstance is one of the most important law principles in the contract of civil law.

情事变更原则是当代债法中最重要的法律原则之一。

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Though there are principal provisions in the General Principles of Civil Law and in the Contract Law concerning the issue, still we see ambiguities in our understanding and judicial practice.

尽管我国民法通则、合同法对无效合同的确认标准做了原则性规定，但在实务中仍存在一些模糊的认识和作法。

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