Impossibility of performance, an important concept in the law of obligation in the Continent law System, is one of core questions in contract law.

履行不能是大陆法系债法上的重要概念，与迟延履行、不完全履行共同构成债务不履行的三大形态，是契约法上的核心问题之一。

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This may be due to the special patent output mechanism of Chinese universities and the property ownership arrangements under the law of obligation.

这可能是由于中国高校特殊的专利产出机制和债权制度下自发形成的产权安排等原因造成的。

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Unjust enrichment system began in Roman law. The remodeling and consolidation of civil law and modern civil become an important area of the law of obligation.

不当得利制度起始于罗马法，历近代民法与现代民法的重塑与整合，成为债法领域的一项重要制度。

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Professor DOUG KMIEC (Pepperdine University): Namely, the responsibility to separate your obligation to be a member of the president's cabinet from your obligation to represent the interests of the law and the Department of Justice.

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U.S. corporate law states that the legal obligation of the directors and officers of a company is to serve the interests of shareholders.

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But council lawyers said the decision was "rational, made with great care and was based on a full appreciation of the obligation to act within the law" and the judge ruled in the authority's favour.

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