The only feasible explanation was that a constant of physics called the fine structure constant, or alpha, had a different value near the time the light started its journey.

唯一可能且合理的解释是：一个被称之为“精细结构常数”或α的物理常数，在临近启程的那段时间产生了一个不同的值。

youdao

Fundamental constants such as the strength of the electromagnetic force - the so-called fine-structure constant, or alpha - get their name from the fact that they are supposedly the same everywhere.

宇宙基本常数，比如电磁力强度之类的精细结构常数，符号位“alpha ”，它们因为被假定为不变量而得名。

youdao

Fundamental constants such as the strength of the electromagnetic force - the so-called fine-structure constant, or alpha - get their name from the fact that they are supposedly the same everywhere.

宇宙基本常数，比如电磁力强度之类的精细结构常数，符号位“alpha ”，它们因为被假定为不变量而得名。

youdao