1、1. There is no science that is completely divorced from life.没有一种科学是同生活绝对脱离的。Jonathan Salle2The value of scientists lies in their selfless service for all peoples interests.科学家的价值在于无私地为所有人的利益服务。Franklin DRoosevelt3Science is an honest thing.科学是一门老老实实的学问。Guo Moruo 4Imagination is more important than
2、knowledge，for knowledge is limited while imagination embraces the entire world and is the source of knowledge evolution.想象力比知识更重要，因为知识是有限的，而想象力概括着世界上的一切，并且是知识进化的源泉。Albert Einstein5Studying knowledge needs thinking again and again，which is a learning method helping me become a scientist.学习知识要善于思考、思考、
3、再思考，我就是靠这个学习方法才成为一名科学家。Albert EinsteinScience fiction is definitely not pure science，but neither is it pure fiction.This literary genre，argues science fiction writer Ben Bova，stands as a bridge between science and fiction，between reason and emotion.Moreover，science fiction is not mere entertainment，
4、but has a more important role to play.Believe it or not，it can help us to understand the ways in which our world may change and assist us in shaping the future in the manner that we wish.Science fiction writers are not in the business of predicting the future.They do something much more important.Th
5、ey try to show the many possible futures that lie open to us.Sometime early in the next century，human beings will move into habitats on Mars.They will live there for about a year，and then will be replaced with another set of pioneers.The establishment of this base on Mars will advance our knowledge
6、of the solar system and aid in our understanding of the earth.Terraforming Mars is theoretically simple: add nitrogen and oxygen to the atmosphere；pump water to the surface；and add the earths plants and animals in the order in which they developed on Earth.But it will take at least 300 years.Some pe
7、ople think that such a project is too huge for humans to accomplish，but there are very good reasons to make the attempt.The earth now contains some 7 billion people，and no one knows how many humans the earth can support.Our very existence and numbers are threatening many other species with extinctio
8、n.We also have had some experience with terraforming our own planet: changing the landscape，the atmosphere and the climate.At present，we are aware of the importance of terraforming the earth as we try to control global warming，air and water pollution，and protect some natural habitats.探索发现1Whats the main idea of this passage?Terraform Mars.2Whats the purpose of establishing a base on Mars?To help us better understand the solar system and the earth.3Whats the authors attitude towards the project?Optimistic.