打开App
360P
火箭为什么要用喇叭状的喷管？原来是为了让气体超音速飞行！
你有没有想过，为什么我们用望远镜就能看到太空中的星星和行星呢？望远镜到底是怎么工作的呢？今天，我们就来揭开望远镜的神秘面纱，让你一睹宇宙的真容！
宇宙知识探秘142/345
App03:08
App03:21
App02:19
App06:34
App03:24
App03:59
App03:33
App01:48
App02:57
App02:45
App03:45
App04:16
App02:06
App02:18
App02:44
App06:50
App03:24
App02:53
App03:29
App03:16
App01:46
App02:09
App03:29
App03:24
App02:10
App03:33
App01:56
App02:54
App03:02
App01:43
App04:20
