cornerstone

US /ˈkɔːr.nɚ.stoʊn/
UK /ˈkɔːr.nɚ.stoʊn/
"cornerstone" picture
1.

基石, 基礎

an important quality or feature on which a particular thing depends or is based

:
Trust is the cornerstone of any strong relationship.
信任是任何牢固關係的基石
Education is the cornerstone of a prosperous society.
教育是繁榮社會的基石
2.

基石, 奠基石

a stone that forms the base of a corner of a building, especially one laid at a formal ceremony

:
The mayor laid the cornerstone for the new library.
市長為新圖書館奠定了基石
The date of construction was carved into the cornerstone.
施工日期刻在奠基石上。