Level 5 · word 7,735 of 20,000
cornerstone
/ˈkɔːrnərˌstoʊn/
American
- n. 基石, 基础
- Definition
- n. something that forms the basic foundation of a system or idea
- Example
- Trust is the cornerstone of any strong friendship.
- 信任是任何牢固友谊的基石。