词汇讲解：
1. anniversary n. 周年纪念
例句：Today is my parents' 30th wedding anniversary.
今天是我父母结婚30周年纪念日。
2. overthrow vt.打倒; 推翻
例句：They overthrew their King.
他们推翻了国王。
3. aftermath n. 后果
例句：In the aftermath of the hurricane, many people's homes were destroyed.
飓风的后果是许多人的房屋被毁。
4. evacuate vt. 使避难,使疏散
例句：The civilians were evacuated from the city to farms.
百姓被从城里疏散到了农庄。
5. invasion n. 入侵,侵略
例句：France itself was threatened with invasion.
法国自身也受到入侵的威胁。
6. wreck n. (被毁车辆,飞机,房屋等的)残骸
例句：All around were the wrecks of previous crashes.
四周全是以前撞毁的汽车的残骸。
7. devastating adj. 毁灭性的
例句：It is the most devastating storm in 20 years.
这是20年来破坏性最大的风暴。
8. sediment n.沉淀物
例句：The sediment settled and the water was clear.
杂质沉淀后, 水变清了。
9. sample vt. 抽样调查
例句：They sampled the population to find out the state of public opinion.
他们从人口中抽样以了解民意状况。
10. abundance n. 大量, 充足
例句：At the party there was food in abundance.
聚会上食品很丰富。
11. gauge vt. 估计, 判断
例句：It's difficult to gauge one's character.
要判断一个人的品格是很困难的。
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