Description: high shelf: an elevated shelf for storing utensils. Tie it up and put it on a high shelf. Metaphor is not necessary.

From: The Book of Jin Yu Yi Zhuan: "This generation should be shelved until the world is peaceful."

For example, if you have a correct theory, just talk about it temporarily and don't implement it, then even the best theory is meaningless.

Mao Zedong's practical theory.

Grammar: formal; As predicate, object and attribute; derogatory sense