这有点儿像大型建筑里的金属框架，由于在表面涂了灰膏、刷了油漆人们就忘记了它的存在，可是一旦把它抽走整座大厦就会坍塌。

It's a little like the metal framework of a large building, once the plaster and paint are on we forget it's there at all. But take that framework away, and the whole building falls down.

youdao

这有点儿像大型建筑里的金属框架，由于在表面涂了灰膏、刷了油漆人们就忘记了它的存在，可是一旦把它抽走整座大厦就会坍塌。

It's a little like the metal framework of a large building, once the plaster and paint are on we forget it's there at all. But take that framework away, and the whole building falls down.

youdao