The principle of discretional evaluation of evidence is a principle system which was acknowledged by many countries.

自由心证制度是近现代各国事实认定的原则性制度。

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This dissertation is a tentative study of pragmatic principles, with a view to clarifying the dimensions of various principles and establishing a principle system.

本文对语用原则研究作了尝试性探究，以期明晰语用原则研究的维度，从而建立一个语用原则系统。

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It is not, in principle, necessary for a biological system to age and die.

原则上来说，生物系统的衰老和死亡都不是必然的。

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Efforts to enhance overall future compliance should forever be a guiding principle of our system of tax administration.

FORBES: New Streamlined Filing Compliance Procedures for Non-Resident U.S. Taxpayers

Most people view the Occupy Wall Street movement as the ideological opposite of the Tea Party, yet they share a remarkably similar motivating principle: a concern that our economic system has become fundamentally unfair.

FORBES: Why Should I Pay Less Taxes Than Someone Who Earns It All by Hard Work?

But it will enshrine a new principle in our financial system: From now on, instead of competing to see who can come up with the cleverest scheme to make the quickest buck, financial institutions will compete to see who can make the better product and the better service.

WHITEHOUSE: Moving Forward on a New Foundation