同样是轨道，为什么火车轨道必须铺石子，而高铁轨道却不用？ Click Cancel Mute Play next after 5 s 同样是轨道，为什么火车轨道必须铺石子，而高铁轨道却不用？ | 2 years ago 2.3K | 2 years ago | Popular science 0 Share WeisWay Follow
05:19 It’s Not Just a Star! The Latest James Webb Space Telescope Image Explained (4K) v101 Science 488 | 2 years ago
05:02 क्या हो अगर हम चांद के आर-पार एक सुरंग खोद लें | What If We Dug A Hole Through The Moon? What If? 4.5K | 2 years ago
10:58 A Rare Nova Just Exploded In the Milky Way and It’s Visible To The Naked Eye The Curiosity 4.9K | 2 years ago
08:26 Approach to OBESITY and Weight gain – causes, risk factors, BMI, complications and treatment Armando-sci 5K | 2 years ago
14:29 क्या होगा अगर ये तीन जानवर आपको निगल लें | What If These Three Animals Swallowed You? What If? 1K | 2 years ago
06:39 Centuries After The Pharaohs, Egypt’s Stone-Carvers Keep Their Traditions Alive | Still Standing ScienceInsider 2K | 2 years ago
.jpg){kind=avatar}
.jpg){kind=avatar}
