273. a different perspective of the world.不同的世界观

　　274. (be) exposed to different ideas and values(使)接触到不同的思想和价值观

　　275. culture shock文化震荡，文化冲击

　　276. The payoff is worthwhile.其回报是丰厚的。 277. perseverance毅力

　　278. adolescence青春期，青年期

　　279. When the children come back, who can guarantee that they can adapt to the fierce competition here? 当这些孩子回来后，谁能保证他们定能适应国内的激烈竞争呢？

　　280. We can see clearly that although teenagers’ studying abroad may bring some favorable results, there are still a lot to worry about.我们不难看出，尽管青少年出国留学有一定好处，但让人担忧之处也有很多。

　　281. Nowadays some college graduates complain that what they learned at college is not much helpful to them in their future work. 如今，一些大学毕业生抱怨，在学校学到的知识对他们要从事的工作没什么太大的帮助。

　　282. It is high time for colleges to advance a revised teaching program and adapt their curricula to the requirements of new times.大学急需修订其教学计划，使课程体系适应新时代的需求。

　　283. the planned economy 计划经济 284. a market-oriented economy市场经济

　　285. It is essential for colleges to make adjustments to their curricula and catch up with the rapid development of modern society. 大学有必要对其课程体系做出调整，从而跟上现代社会的发展步伐。　

　　286. far-reaching深远的 287.gain social experience获得社会经验

　　288. conduct some social investigations做一些社会调查

　　289. drop out of school失学　290. poverty-stricken area贫困地区

　　291. call on people in the developed areas to lend their hands to those children号召发达地区的人们帮助那些(贫困)孩子

　　292. Therefore, the Project Hope is the hope of those remote regions as well as that of the whole nation.因此，希望工程体现的不仅是那些边远地区的希望，也体现了整个国家的希望。

　　293. pocket money零用钱

　　294. I firmly believe that with the effort of our government and the whole nation, the Project Hope is bound to be a success. 我相信，在我们政府和全国人民的努力下，希望工程一定能取得成功。