Unit 20 New Frontiers单元小结Mike is a specialist in algebra and geometry. His only recreation is scientific and technical inventions. He has published many articles in many famous journals and won several patents.One day, he was invited to a seminar held by an enterprise. The participants were from all walks of life, including some officials, some software programmers and some futurologists.Shortly after the seminar began, many issues were put forward, such as starvation in African countries, racial discrimination in America and the conflicts in Mideast. Permanent peace, equality and happiness were what all the people wished for.Meanwhile, some digital and electronic products were presented.Finally, Mike declared that he brought two new inventions. One was a kind of liquid which could remove the stain on garments quickly; the other was a kind of material that could deal with poisonous chemicals in rivers.He was very outspoken. He said that at present pollution was very serious worldwide and that if we permitted the situation to go on, the outcome would be hard to imagine.The organizers also encouraged people to invest in poor countries.After the seminar, all the participants got beautiful souvenirs.迈克是一位代数和几何专家。他仅有的娱乐是科技小发明。他已经在许多著名杂志上发表了很多文章，还获得了若干项专利。一天，他被邀请去参加一个由企业举办的研讨会。与会者来自社会的各行各业，包括一些官员，一些软件程序员以及一些未来学家。研讨会开始不久，他们就提出了很多问题，例如非洲国家的饥饿、美国的种族歧视以及中东的冲突。永久的和平、平等以及幸福是所有人共同的期盼。同时，一些数码和电子产品也在研讨会上被呈现。最后，麦克宣布他带来了两项新发明。一项是一种能快速清除衣服上污渍的液体，另一项是一种能处理河流里有毒化学物质的材料。他很直言不讳。他说目前全球的污染非常严重，如果我们允许这种情况继续下去，那...
