Lignt reaches us from the moon in less than a second and a half.是什么意思
问题描述:
Lignt reaches us from the moon in less than a second and a half.是什么意思
答
光从月球上到达我们需要不到一秒半的时间
Lignt reaches us from the moon in less than a second and a half.是什么意思
光从月球上到达我们需要不到一秒半的时间