reactive

adjective

🔊/riˈæktɪv/

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(formal) showing a reaction or response反应的；有反应的；回应的
- The police presented a reactive rather than preventive strategy against crime.警方对付犯罪的办法，不是事先加以防范，而是事后作出反应。🔊🔊
compare proactiveTopics Change, cause and effectc2
(chemistry化学) tending to show chemical change when mixed with another substance能起化学反应的；易反应的
- highly reactive substances很容易起反应的物质