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来自MSN
5 天
太空电梯应该怎么建造?为什么人类直到现在也没有造出太空电梯?
我们人类的梦想是星辰大海,但“低效率”的火箭技术却禁锢着人类探索外太空的脚步,通常来讲,我们要将一个具有一定质量的物体送上太空,往往需要消耗数十倍该物体质量的燃料。
青报网
23 天
观海微纪录丨顶着海风徒手爬十几层楼高悬梯、引399米“巨无霸”进 ...
2024-11-30 16:47:03 作者:朱鋆瑶姜玲李竹音史玉辰韩世琛孙成富 大海掀起巨浪,巨轮剧烈颠簸,无任何保护措施,徒手爬十几层 ...
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