举例英语的前缀,后缀,(中文意思)并给出单词答:3)表示反动作的意思 de-, defend, demodulation(解调) dis-, disarm, disconnect un-, unload, uncover 4)表示相反,相互对立意思 anti-, ant- antiknock( 防震), antforeign,(排外的) contra-, contre-, contro-, contradiction, countercurrent (逆流) counter-, counterreaction, counterbalance ob-, oc-,...