- (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。
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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