Mass media are tools of communication.Mass media allow us to record and pass information rapidly to a large，scattered(分散的)audience.They extend our ability to talk to each other by helping us overcome barriers caused by time and space.

    There are various ways in which mass media make daily life easier for us.

    First,they inform and help us keep a watch on our world. They gather and pass on information we would be unlikely or unable to get on our own.

    Second，mass media help us to arrange our time and life.  What we talk about and what we think about are greatly influenced by the media.When people get together，they tend to talk about certain happenings in the newspapers or on TV.Because we are exposed(暴露)to different points of view through different kinds of media every day，we are able to evaluate(评价)all sides of a certain issue.

    Third,the media are used to persuade people. A good example is advertising through the media.Newspapers，magazines and TV are filled with all kinds of colorful，persuasive advertisements.Though many advertising may not say openly that they want you to buy a certain product，they describe their products in such a way that you may want to buy them.

    Fourth,the media also entertain.  All of the media make some efforts to entertain their audience.For instance，even though the newspaper is primarily a medium of information，it also contains entertainment features(特征)．Television，motion pictures，fiction books and some radio stations and magazines are devoted mainly to entertainment.It is estimated that in the future，the entertainment function of mass media will become even more important than it is now.

    You have probably been told by your high school instructor that writing is an important and practical skill. However, you may not be convinced that the ability to write will be important in your own future. If so, you will be surprised at the results of a recent survey by the National Institute of Education. More than four thousand working men and women who had graduated fifteen years earlier were asked to name the courses they would have taken in college if they had known better. The designer of the survey expected people to name courses in computer science, mathematics, or business. But the course most often mentioned was writing.

    If you already have a job, you are probably not surprised at their answers. Many jobs require the ability to write. Despite the increasing use of the telephone and the computer, much information must be communicated in writing.Some ten million people—managers, engineers, sales representatives, and many others— write regularly as part of their jobs. Summaries, reports, reports, letters and speeches are required in today's work world. The ability to write, therefore, is an important skill. The successful individual is almost always the one who can communicate successfully in writing.

    Writing communicates your thoughts and feelings to others; it also tells you something about yourself. Maybe this is what Eldridge Cleaver had in mind in his autobiography, “I started to write... to save myself...I had to seek out the truth... I had to find out who I am and what I want to be ,what type of man I should be ,and what I could do to become the best of which I was capable.”

    The private automobile (私家车）has long played an important role in the United States. In fact, it has become a necessary and important part of the American way of life. In 1986, sixty-nine percent of American families owned at least one car, and thirty-eight percent had more than one. By giving workers rapid transportation, the automobile has freed them from having to live near their place of work. This has encouraged the growth of the cities, but it has also led to traffic problems.

    For farm families the automobile is very helpful. It has made it possible for them to travel to town very often for business and for pleasure, and also to transport their children to distant schools.

    Family life has been affected（影响）in various ways. The car helps to keep families together when it is used for picnics, outings, and other shared experiences. However, when teenage children have the use of the car, their parents can't keep an eye on them. There is a great danger if the driver has been drinking alcohol or taking drugs, or showing off by speeding or breaking down traffic laws. Mothers of victims（受害者）of such accidents have formed an organization called MADD (Mothers Against Drunk Driving). These women want to prevent further tragedies (悲剧）. They have worked to encourage the government to limit the youngest drinking age. Students have formed a similar organization, SADD (Students Against Drunk Driving) and are spreading the same message among their friends.

    For many Americans the automobile is a necessity. But for some, it is also a mark of social position and for young people, a sign of becoming an adult. Altogether, cars mean very much to Americans.

    The year 3700, Earth is far too hot for any human to call it home. On this planet at least, man is nothing more than a memory--if there is anything left to remember the "wise man". But what about our wisdom--will any of it survive us?

    The conventional answer is no. Knowledge requires a knower, and there will be no knowing minds around then. But if information survives, perhaps in books or hard drives, maybe the knowledge isn't quite dead but dormant(休眠), ready to become alive with the help of other minds that develop over time or come to visit Earth in the distant future.

    At first sight, that seems to be reasonable: after all, we have done similar things with past knowledge. For example, we saved an ancient computer from a ship destroyed at sea off the southern coast of Greece, and succeeded in finding the meaning of Egyptian hieroglyphics(象形文字). Careful work can bring previously lost wisdom back to life.

    However, the key point is that there is a certain cultural continuity with those ancient times that allows us to reason and make progress in the dark: we know we are dealing with the legacy(遗产)of other humans. Without that link, the survival of objects and raw data doesn't guarantee the survival of knowledge. And a lack of continuity in language with any future intelligence would be a barrier. Knowledge is closely connected with language. When a language dies out, we can lose systems of reasoning that they contain. If that's lost, then it can't be recovered.

    All this means that other minds might not be able to fully make human knowledge alive when we are gone. It is better to concentrate on not dying out in the first place.

    NASA's (美国宇航局的) newly announced space tourism program is possibly the biggest mistake in the agency's history.

    Beginning as early as 2020, NASA will offer visits to the International Space Station for $35,000 per night, not including transportation, to pretty much anyone who can pass a physical.

    The reason this is a mistake, and a big one, is that NASA has worked for generations to create an image of astronauts as extraordinarily skilled, highly trained, courageous heroes. For example, NASA invites grade schools to participate in creating experiments that are carried on the space station. The astronauts talk to kids from space, sending a message that if you study, work hard and learn math and science, you may reach these heights, too.

    According to one report, Las Vegas-based Bigelow Aerospace is making plans to haul four tourists at a time to the space station on SpaceX rockets. U.S. taxpayers forked over a hundred billion dollars to build the International Space Station. It would be nice to try to preserve the image of it as an inspirational achievement, instead of turning it into a flying Howard Johnson's.

    NASA's press release about the space tourism program tries to cast it as a partnership with the private sector to "provide expanded opportunities" at the space station to "manufacture, market and promote commercial products and services." But it also states that one goal is "quantifying NASA's long-term demand for activities in low-Earth orbit."

    The space station has been costing U.S. taxpayers between $1.5 billion and $3 billion each year. If it's perceived as a private Disneyland for the top tax bracket, public support for the entire space program could be at risk.

    But worse, we will have degraded what once inspired us. Sometimes a nation needs stars in its eyes.

    We are the CEOs. We are the head designers. We are the top engineers. We are the senior creators. We are the inventors. We are the only maker of our own happiness.

    However, we still have learned that people's views on happiness often change with many outside things. Some people smile happily beside their new cars and homes. Students feel excited when they get better grades. Babies laugh loudly when they get new toys. Maybe true happiness has been lost in these things.

    How could we have allowed ourselves to be cheated for so long? Something outside may give us happiness, but what directs us to real happiness is inner (内在的) spirit.

    Our spirit is so easily broken, yet it is the single strongest thing we own. Why do people with terrible diseases still smile? Why do those with a broken heart still find joy? The inner spirit is powerful, and it is the only thing on earth that can be broken into pieces but can perfectly mend itself with time. Think about those who suffer a lot but still feel happy. Their inner spirit is very strong.

    Our inner spirit will be the greatest gift that we give ourselves. It is our compass (指南针) to happiness, but we are the tour guides.