cornerstone
US
UK cornerstone n: figurative (basis, primary thing) (比喻)
SC 基础，基石，柱石 jī chǔ，jī shí ，zhù shí
TC 基礎
TC 基礎
The speaker said that education is the cornerstone of a successful life.
发言人说，教育是成功人生的基石。
cornerstone n: (building) (建筑物)
SC 基石，奠基石 jī shí ，diàn jī shí
The mayor will lay the cornerstone for the new fire station tomorrow.
明天市长将为新的消防站奠基。