These plates were then placed onto a mesh underlayer, which created even more flexibility.

然后将这些板放置在网状底层上，从而产生更活。

He realized that he was semi-delirious, that he should dig himself into the sand, find the relatively cool underlayer and cover himself with it.

他意识到自己半昏迷了，他应该把自己挖到沙子里，找到相对凉爽底层，然后用它盖住自己。