a. 毁灭性的, 破坏的, 有害的【医】 破坏的, 毁坏的

◆记忆方法一：
分析：destr——破坏（destroy）的近似拼写；uctive——活跃的（active）的
近似拼写。
记忆：活跃地破坏，就会带来毁灭性的破坏。

◆记忆方法二：
词根词缀记忆法：destructive a 有破坏力的（de+struct+ion）,struct=build，表示“建立”

destroy/destroyer/destruction/destructive/structure/construct/instruct/instruction/instructive/ruin/damage
记忆：
1. 词根struct, stroy [strRI] 含义是“建筑，构造”, de- 相反；destroy [ dis5trCi ] 与构造相反，vt.破坏, 毁坏, 消灭； Nuclear weapons can destroy the whole earth.核武器会毁灭整个地球。
2. destruction [ dis5trQkFEn ] n. 破坏, 毁坏 The weapons out of control can lead to the destruction of the whole world.失控的武器可能引起世界的毁灭。
3. destructive [ dis5trQktiv ] adj. 破坏性的, 毁坏性的 Any earthquake can be destructive.任何地震都可能是破坏性的。
4. structure [ 5strQktFE ] n. 结构 We don’t think the inner structure of the house is reasonable.我们认为这房子的内部结构不合理。
5. construct [ kEn5strQkt ] v.建设 Chinese people are devoted to constructing a well-off society.中国人民正在致力于建设一个小康社会。
6. instruct [ in5strQkt ] v. 指导，教导 Who can instruct me how to learn English well in a short time?谁能教我们短期内学好英语？
7. instruction [ in5strQkFEn ] n. 指导，指示 Read the instruction carefully on the bottle before you take the medicine.服药前要仔细阅读瓶上的说明。
8. instructive [ in5strQktiv] adj. 有指导性的，有启发性的 The song should be both entertaining and instructive.歌曲应该既有娱乐性，又有启发性。
9. ruin [ ruin; 5ru:in ] n. (使)破产, (使)堕落, 毁灭 n. 毁灭, 废墟 The laziness ruined his future.他毁于懒惰。
10. damage [ 5dAmidV ] n. 损害, 伤害 n. 损害 The car has been damaged. I need to have it repaired.车已坏了。我需要找人修理一下。
另类阅读：
The US destroyer destroyed the coastal town. The destructive event not only damaged the county but also ruined the reputation(fame) of the USA.