Standards of proof is the core problem in judicial proceedings and also an important theoretical and practical problem in the lawsuit system and evidence system.

证明标准问题是诉讼证明的核心问题，也是诉讼制度及证据制度的一个重要的理论与实践问题。

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The study of rural land institution construction is not only a significant theoretical problem, but a more intricate practical problem.

研究农村土地制度的建设历来都是极其重要的理论问题，更是极为复杂的实践问题。

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The payment of the issuing bank is an important theoretical and practical problem.

开证银行付款问题是重大的理论和实践问题。

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But this theoretical neatness runs into a practical problem.

ECONOMIST: Cosmology

This dissolution of the relationship between economics and finance is a huge problem, because interest rates are the theoretical and practical foundation of all financial valuation.

FORBES: Interest Rates For Dummies: Solving The Interest-Rate Puzzle