Can we skirt Einstein's theory of special relativity and travel faster than a beam of light?
2
光速是爱因斯坦狭义相对论的基石，为我们提供了因果关系的概念：原因先于结果出现。
The speed of light is a cornerstone in Einstein's theory of special relativity, which is what gives us the concept of causality: causes precede effects.
3
阿尔伯特·爱因斯坦在1905年预测到了这一点，当时他在狭义相对论中引入了相对时间的概念。
Albert Einstein predicted this in 1905, when he introduced the concept of relative time as part of his special theory of relativity.
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