This is how the researchers think that the cages form but until recently they didn't even know they existed.

这就是研究人员认为笼子形成的方式，但直到最近他们甚至都不知道它们的存在。

All the while, his arms formed an iron cage of protection around me - I was barely jostled. But I still was gasping as I tried to right myself.

整个过程中，他的手臂一直像一个铁笼子一样保护着我——我没有受到任何冲击。但我依然透不过气来，努力想让自己在沙发上坐起来。