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漂浮在地面之上,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就是很容易剧烈燃烧。 Once upon a time, the “Hindenburg” airship was the most modern route across the Atlantic Ocean. Even though it was as large as an office building, the German-made airship was able to float freely on the ground. The aircraft’s air chambers (some huge airbags) are full of hydrogen. One of the characteristics of hydrogen is that it weighs less than air, only 1/13 of the weight of air. However, there is also a characteristic of hydrogen that is easily burned.