251.dispel the mist and explain many phenomena that we thought of as mysteries in the past

252.both the senior citizens and the youth

253.Only this way can the essence the of traditional culture be inherited as it should be.

254.Zoos provide recreation and refreshment for fatigue d urban dwellers.

255.dreamland s for small children

256.dragon's descendant s 龙的传人

257.add to their knowledge something they will never acquire in the classroom

258.research facilities

259.gradually rises to 10% at 8:00 and maintains the same for the next 2 hours

260.There is ... increase ... ,however, after that it drops.

261.During the period from .. to .. , the output increased.

262.This is not a matter of the-earlier-the-better when we discuss sth.

263.It's difficult for them to cope with problems that others find easy to handle.

264.near-sightedness and stunt ed growth

265.sb should be on guard against sth.

266.Many people hold optimistic attitude towards... ,and are confident of the positive alterations it will bring to the present world.

267.transformation

268.People who believe in different religions may learn to give understanding to one another.

269.I hope you will place strong emphasis on living a healthy life in order to be truly happy.

270.The 'healthy' in question refers to being at the same time mentally and physically healthy.

271.From this prospective , sb can be considered as...

272.receive higher education

273.His work is more meaningful to the society he lives in.

274.Economists and merchant s may serve as perfect examples to verify this point.

275.One's earning can not be solely determined by his education background. 来源:可可英语 //www.utensil-race.com/ielts/201210/205753.shtml