Knowing that the roof will not fall in should give engineers the confidence to work on other aspects of the idea, such as how to use inflatable structures to cap the ends of a pressurised section of the tube.

知道屋顶不会塌陷应该让工程师有信心研究这个想法的其他方面，例如如何使用充气结构来盖住管道加压部分的末端。