2019年3月28日星期四

Air taxis, delivery drones, supersonic travel... what to expect in 2050?



from New China TV https://www.youtube.com/watch?v=qjvJqndqfH4
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Time-lapse: Beautiful cacti bloom before your eyes

from New China TV https://www.youtube.com/watch?v=LWntHYtd5Vo