not be carved/etched in stoneused to say an idea or plan could change 〔想法、计划等〕并非不可更改 John has several new ideas for the show, but nothing is etched in stone yet. 约翰对这个节目有一些新的构想,但现在还什么都没定。
not be carved/etched in stone• John has several new ideas for the show, but nothing is etched in stone yet.
→ not be carved/etched in stone at stone1(3)