11. ridiculous [rɪ'dɪkjələs] adj. 可笑的，荒漠的
例句：It’s ridiculous that we have to wait six weeks. 我们得等六个星期，这太荒谬了。
12.rival ['raɪvl] n. 竞争对手，敌手
例句：This gives the company a competitive advantage over its rivals. 这使该公司与其对*比具有一项竞争优势。
13.route [raʊt] n. 路；路线；航线
例句：We weren’t sure about which route we should take. 我们拿不准应该走哪条路线。
14.sanitation [sænɪ'teɪʃ(ə)n] n. 卫生环境，卫生设备
例句：Overcrowding and poor sanitation are common problems in prisons. 过度拥挤和卫生状况差是监狱里的普遍问题。
15.scale [skeɪl] n. 大小，规模；等级；刻度
例句：There has been housing development on a massive scale since 1980. 自1980年以来一直在大规模地进行住宅开发。
16.scan [skæn] vt. 细看；扫描；浏览
例句：She scanned through the paper. 她浏览了一下报纸。
17.scandal ['skændl] n. 丑事，*
例句：It caused quite a scandal when he left his wife. 他离开妻子成了一大*。
18.scratch [skrætʃ] v. /n. 抓，搔，扒
例句：He was scratching at the bites on his arm. 他挠着手臂上被叮咬的地方。
19.security [ sɪ'kjʊrətɪ] n. 安全，保障
例句：A large number of homes lack adequate security measures . 许多住宅都未采取足够的安全措施。
20.sensible [ 'sensəbl] adj. 明智的, 有判断力的
例句：She seems very sensible. 她好像很明智。
