词汇讲解：
1. shortage n. 缺少,不足,匮乏
例句：There is a shortage of salt in this country.
这个国家缺少盐。
2. abundance n. 大量, 充足
例句：There was an abundance of corn last year.
去年玉米丰收。
3. menu n. 菜单
例句：Please show me the menu.
请给我看看菜单。
4. raw adj. 生的, 未煮过的
例句：The Japanese often eat raw fish.
日本人常吃生鱼。
5. artificial adj. 人造的, 人工的, 假的
例句：The new dam will form a large artificial lake behind it.
新筑的水坝将会在后面形成一个人工湖。
6. overcome vt. 战胜; 克服
例句：He believed the faith that truth would overcome.
他相信真理终会得胜。
7. separate v. 分开, 隔离
例句：The war separated many families.
战争使许多家庭离散。
8. instruct vt. 教, 指导
例句：She instructs music once a week at a middle school.
她在中学每周教一次音乐课。
9. appreciate vt. 欣赏, 赏识, 重视
例句：You can't appreciate English poetry unless you understand its rhythm.
你若不懂英文诗韵律, 就无法欣赏英文诗。
10. strive vi. 努力奋斗; 力求
例句：The swimmer was striving against the current.
游泳者正在和激浪搏斗。
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