http://blogs.scientificamerican.com/media/inline/blog/Image/Rocket-flight-blog.jpgtry using some technology 0 z5 Y9 p; `( @( h: z
Pedestrian_A 發表於 2016-2-19 04:22 PM  - Y! g- P8 C! Q$ Z3 o5 @; E9 [0 gtvb now,tvbnow,bttvbtvb now,tvbnow,bttvb, Q4 ?& c5 i. r+ {3 d6 o- z5 K4 ` b
New technology is not good here it will skip your floors. |