Its age, and the finite speed of light, means no astronomer can look beyond a distance of 13.7 billion light-years.
它的年龄及有限的光速意味着没有天文学家能超越137亿光年。
Its age, and the finite speed of light, means no astronomer can look beyond a distance of 13.7 billion light-years. But it is probably bigger than that.
由于光速的限制和宇宙的年龄，这意味着天文学家看不到137亿光年以外的东西，但宇宙本身很可能更大。
Locality of action shows itself in the finite speed of light, in the inverse square law of fields, and in macroscopic statistical effects, such as rates of reaction and the speed of sound.
作用力的局限性体现在光速是有限的，体现在场的平方反比定律之中［4］，还体现在宏观统计效应上，如反应速度和音速等。
For some centuries before there was experimental proof, it was believed that the speed of light must be finite.
在有实验证明以前好几个世纪，人们就已相信光的速率必定是有限的。
For some centuries before there was experimental proof, it was believed that the speed of light must be finite.
在有实验证明以前好几个世纪，人们就已相信光的速率必定是有限的。
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