| 释义 |
| | | | NOUN | | | | | /ˈkɒŋkriːt/ | | | | | | a hard substance used in building made by mixing cement , sand , small stones, and water 混凝土 | The floors were made of concrete. 这些地板是混凝土浇筑的。 | | | PHRASE | | - | be set in concrete
| | to be fixed and impossible to change | | 固定不变 | | | | The rules are not set in concrete. 这些规则并不是一成不变的。 | | | | |