Ownership is an important theoretical and practical problem.

所有制问题是重大的理论问题及现实问题。

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Civil litigation cost is a theoretical and practical problem.

民事诉讼费用既是一个理论问题，又是一个实践问题。

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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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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