| 释义 |
| | | | ADJ | | | | | /riˈæktɪv/ | | | | | 1 | reacting to things that happen , rather than making things happen yourself 作出反应的 | | | | 2 | science a reactive substance experiences a chemical reaction when it is mixed with another substance （物质）能起化学作用的 | | | | DERIVED WORD | | reactivity noun U | | | /ˌriːækˈtɪvəti/ | | | | |