251. pay off 赢利,取得好结果

252. persist in 坚持

253.pick up 捡起,接,学会

254.properly speaking 正确(公正)地讲

255.provided that 假若,倘如

256.put up with 忍受

257. quite other 完全不同的

258. rather than 而不是

259. refer to 提到,参考

260.reflect discredit on 使丧失名誉

261.reflect on 思考,反省

262. result from 由…...导致

263. result in 导致......

264. root out 发现

265. run a risk 冒险

266. set about 开始,着手

267. set aside 留出,不顾

268. set down 放下;记下

269. set off 出发,使爆炸

270. set out 启程

271. shoot a film 拍摄一个镜头

272. since then 从那时起

273. something like 大约,有几分像……

274. sooner than 早于......

275.speed up 加速

276.stand for 代表,象征

277.step up 加速

278.stick to 坚持

279.stir up 激起,引起

280.such as 比方说,例如

281.take away 拿走

282.take a step 采取措施

283.take advantage of 利用

284.take care of 照管;照顾

285. take in 接受,吸收,欺骗

286. take on 呈现,

287. take over 接管

288. take up 占据（时间或空间）,从事

289. thanks to 由于,幸亏

290. the former…the latter… 前者…...,后者......

291. to some extent 某种程度上

292. together with 和......一起

293. turn round 转过身来

294. turn to 求助于

295. what is more 而且