【 在 snowfields (snowfields) 的大作中提到: 】 : From the perspective of a photon, there is no such thing as time. It's emitted, and might exist for hundreds of trillions of years, but for the photon, there's zero time elapsed between when it's emitted and when it's absorbed again. It doesn't experience distance either. : : 【 在 niumiu 的大作中提到: 】 : : 既然有光速,当然去任何距离都是有时间的,这是很显然的 -- FROM 136.56.52.*