Economics is precise about the tax that should, in principle, be levied to deal with negative externalities: the tax on a liter of fuel should be equal to the harm caused by using a liter of fuel.

从经济学的角度来看，为了应对负外部性，原则上应该征收的税收是准确的：对一升燃料征收的税应该等于使用一升燃料所造成的危害。

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He added, "the court ruled in a clear and precise way a simple principle." This principle is equality before the law.

他还说：“法庭以清晰而准确的方式体现了一种简单的原则，那就是法律面前人人平等。”

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Let's see. The first and the second claims, I don't really need to justify because the first one is just stating some general principle, but I am not making a precise mathematical claim.

来看一下，第一个和第二个说明，我并不需要证明，因为第一个叙述的是一般原理，但我没有给出一个严格的数学证明。

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This defect allows one otherwise excluded wavelength to travel through the wire, permitting extremely precise filtering that could, in principle, be used to resolve many hundreds of individual signals carried along an individual fibre.

ECONOMIST: New-age crystals

Scientists in Spain have managed to produce measurements that are more precise than those predicted by the Heisenberg Uncertainty Principle.

FORBES: Scientists Beat the Heisenberg Uncertainty Principle

While it is challenging to define precise triggers ex ante, we might be able to determine them in principle.

FORBES: We Need Smarter Regulation, Not More