263. safeguard v. 保护
264. savage a. 野蛮的 =not civilized
265. scent n. 香味 The scent of women
266. scrutiny n. 细看
267. setback n. 挫折
268. shatter v. 使粉碎 It shattered my dream.
269. simulate v. 模拟
270. skeptical a. 怀疑的
271. slack a. 松弛的
272. sneak v. 溜;偷偷地做
273. sober a. 未醉的 Im ~ enough.
274. specifications n. 规格,说明书
275. spectacle n. 景象,大观
276. spectator n. 旁观者
277. spontaneous a. 自发的
278. stability n. 稳定
279. stagger v. 蹒跚
280. stationary a. 固定的
281. stimulus n. 刺激
282. straightforward a. 坦率的 a ~ reply
283. stubborn a. 倔强的
284. stumble v. 绊倒
285. subordinate a. 从属的
286. subscribe to v. 订阅
287. subsidy n. 补贴
288. subtle a. 微妙的 the ~ difference of the two words
289. supervise v. 监督
290. suppress v. 镇压; 抑制
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