22. armed conflict 武装冲突
21. on (the / an ) average 平均地
20.a variety of 种类繁多的
19. be buried in thoughts 沉思
18. object to sth / doing sth 反对、不赞成
17. a piece of clothing / a suit of clothes一件衣服
16. give sb an idea of 使某人明白
15. a powerful class 有权阶级
14. tend to 趋向于
13. dig up 挖出