如果全球定位系统不能修正相对论效应——爱因斯坦最著名的发现相对论的产物，这些信号就会积累大量的误差，其数据就会变得毫无意义。

If they could not correct for the effects of relativity, Einstein's most famous discovery, GPS signals would accumulate so many errors that their data would be meaningless.

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很多研究员都指责案例对照法不是展现因果关系直接有力的方法，尤其因为它受制于大量的记忆误差。

Many researchers fault case-control work as being a weak method for showing direct causality, especially because it is subject to substantial recall bias.

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大量现场数据的实验证明了该方法的正确性和可行性，它是一种新的表面缺陷误差判别方法。

Experimental data showed the correctness and feasibility of the method. It is a new method for error judgement of surface flaws.

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