曾几何时,搭乘“兴登堡”飞艇是横跨大西洋的最现代化的途径,尽管它体积足有一座办公楼那么大,但是这艘德国制造的飞艇还是能够自由自在地飘浮在地面之上。这艘航空器的气室(一些巨大的气囊)中充满了氢气,氢气的一个特性就是重量比空气轻,只有空气重量的1/13。不过,氢气还有一个特性,那就是很容易剧烈燃烧。1937年5月6日,当“兴 Once upon a time, the ”Hindenburg“ airship was the most modern way to cross the Atlantic. Despite being as large as an office building, the German-made airship was free to float above the ground. The chamber of the aircraft, some huge airbags, is filled with hydrogen. One of the hallmarks of hydrogen is that it weighs less than air and weighs only 1/13 of the weight of the air. However, there is another characteristic hydrogen, that is, it is easy to burn violently. May 6, 1937, when ”Xing