be set in concrete

(of a policy or idea) be fixed and unalterable

（政策，思想觀念）固定不變的，確定的；不可變更的

I do not regard the constitution as set in concrete.

我不認(rèn)為憲法是不可變更的。

in the concrete

(formal)in reality or in practice

(正式)具體地；實際上，事實上