(1)作出反应((of a person or thing) act in response to another person or stimulation)[I，I+prep(to)]：～badly(positively/negatively/strongly) to the criticism/the idea/the suggestion 对那批评/意见/建议作出不好(积极/消极/强烈)的反应;Workers～ed by striking in June. 工人们通过6月份罢工作出了反应。How is your patient～ing to the course of treatment? 你的病人对这个疗程有什么反应?〖同〗respond;

(2)反抗(对)(act in an opposing or contrary manner)[I，I+prep(against)]：～against sb's suggestion/sb's strictness/Victorian traditions/the political system/the dictator反对某人的建议/某人的严厉/维多丽亚时代的传统/这种政治体制/那个独裁者;～against oppression 反抗压迫;

(3)起作用，产生影响(have a particular effect(up)on sth)[I+prep(on)]：～on each other 相互作用;～on industry/market 对工业/市场产生影响;The rise of grain costs～ed on the price of cooking oil. 粮食成本的上涨对食用油的价格产生了影响。

(4)起化学反应(undergo chemical changes)[I，I+prep(with)，I+adv(together)]：Hydrogen～s with oxygen. 氢与氧起反应。Oxygen～s vigorously with the impurities in the iron. 氧与铁中的杂质产生强烈的化学反应。Iron and water～together. 铁与水能起反应。

→ re′active adj 反应的;反对(动)的;re′actor n 反应器;反应堆(剂);re′action n