2007年大學英語四六級講義——四級寫作（下）

　　Communication and Culture Change(通訊與文化演變)

　　Since the time of writing, communication technologies have had a major influence on society. Most observers agree that communication media and technologies have contributed to a society that is changing very rapidly.

　　Privacy(隱私)

　　New communication and information technologies have enabled many organizations and people to collect, organize, and sell information about other people and organizations, both quickly and cheaply. The easy availability of personal information makes banking, education, health care, and sales much more convenient for both consumers and sellers. Scanners in the supermarket rapidly and accurately record every item that passes over them, making grocery checkouts faster and error free.

　　The negative side to all this shared information is that there is little control over who sees or uses this personal information. Many people worry that having so much of their personal information available to so many others may hurt their privacy.

　　Information Equity(信息平等)

　　Another concern among researchers studying changes in society is the growing gap between the information rich (people with easy access to information) and the information poor (people with less access to information).

　　七 、網(wǎng)絡(luò)科技(Internet)

　　Introduction

　　Internet, computer-based global information system. The Internet is composed of many interconnected computer networks. The Internet has made it possible for people all over the world to effectively and inexpensively communicate with one another. An individual who has Internet access can communicate directly with anyone else on the Internet, make information available to others, find information provided by others, or sell products with a minimum overhead cost.

　　The Internet has brought new opportunities to government, business, and education. Governments use the Internet for internal communication, distribution of information, and automated tax processing. In addition to offering goods and services online to customers, businesses use the Internet to interact with other businesses. Many individuals use the Internet for shopping, paying bills, and online banking. Educational institutions use the Internet for research and to deliver courses to students at remote sites.

　　The Internet’s success arises from its flexibility. Instead of restricting component networks to a particular manufacturer or particular type, Internet technology allows interconnection of any kind of computer network. No network is too large or too small, too fast or too slow to be interconnected.

　　An organization that has many computers usually owns and operates a private network, called an intranet, that connects all the computers within the organization. To provide Internet service, the organization connects its intranet to the Internet. Unlike public access networks, intranets are restricted to provide security. The restrictions allow computers inside the organization to exchange information but keep the information confidential and protected from outsiders.

　　Uses of The Internet(用途)

　　Companies, individuals, and institutions use the Internet in many ways. Companies use the Internet for electronic commerce, also called e-commerce, including advertising, selling, buying, distributing products, and providing customer service. In addition, companies use the Internet for business-to-business transactions, such as exchanging financial information and accessing complex databases. Businesses and institutions use the Internet for voice and video conferencing and other forms of communication that enable people to telecommute (work away from the office using a computer).

　　The use of electronic mail (e-mail) speeds communication between companies, among coworkers, and among other individuals. Media and entertainment companies use the Internet for online news and weather services and to broadcast audio and video, including live radio and television programs.

　　Online chat allows people to carry on discussions using written text. Scientists and scholars use the Internet to communicate with colleagues, perform research, distribute lecture notes and course materials to students, and publish papers and articles. Individuals use the Internet for communication, entertainment, finding information, and buying and selling goods and services.

　　Electronic Mail(電子郵件)

　　Electronic mail, or e-mail, is a widely used Internet application that enables individuals or groups of individuals to quickly exchange messages, even if the users are geographically separated by large distances. Because e-mail is a convenient and inexpensive form of communication, it has dramatically improved personal and business communications.

　　E-mail software has also been extended to allow the transfer of nontext documents, such as graphics and other images, executable computer programs, and prerecorded audio. Such documents, appended to an e-mail message, are called attachments.

　　Problems(存在問題)

　　Other important questions concerning Internet growth relate to government controls, especially taxation and censorship. Because the Internet has grown so rapidly, governments have had little time to pass laws that control its deployment and use, impose taxes on Internet commerce, or otherwise regulate content.

　　Increasing commercial use of the Internet has heightened security and privacy concerns. With a credit or debit card, an Internet user can order almost anything from an Internet site and have it delivered to their home or office. Companies doing business over the Internet need sophisticated security measures to protect credit card, bank account, and social security numbers from unauthorized access as they pass across the Internet The questions of government control and Internet security will continue to be important as the Internet grows.

　　八、日常生活(Everyday Life)

　　Food

　　The United States has rich and productive land that has provided Americans with plentiful resources for a healthy diet. Despite this, Americans did not begin to pay close attention to the variety and quality of the food they ate until the 20th century, when they became concerned about eating too much and becoming overweight.

　　By the late 20th century, Americans had become more conscious of their diets, eating more poultry, fish, and fresh fruits and vegetables and fewer eggs and less beef. They also began appreciating fresh ingredients and livelier flavors, and cooks began to rediscover many world cuisines in forms closer to their original.

　　As Americans became more concerned about their diets, they also became more ecologically conscious. This consciousness often included an antitechnology aspect that led some Americans to switch to a partially or wholly vegetarian diet, or to emphasize products produced organically (without chemical fertilizers and pesticides).

　　At the end of the 20th century, American eating habits and food production were increasingly taking place outside the home. Many people relied on restaurants and on new types of fully prepared meals to help busy families in which both adults worked full-time. Another sign of the public’s changing food habits was the microwave oven, probably the most widely used new kitchen appliance, since it can quickly cook foods and reheat prepared foods and leftovers.

　　Dress(穿衣)

　　In many regions of the world, people wear traditional costumes at festivals or holidays, and sometimes more regularly. Americans, however, do not have distinctive folk attire with a long tradition.

　　American dress is distinctive because of its casualness. Blue jeans are probably the single most representative article of American clothing. By highlighting the right label and achieving the right look, blue jeans, despite their worker origins, ironically embodied the status consciousness of American fashion and the eagerness to approximate the latest fad.

　　American informality in dress is such a strong part of American culture that many workplaces have adopted the idea of “casual Friday,” a day when workers are encouraged to dress down from their usual professional attire. For many high-tech industries located along the West Coast, as well as among faculty at colleges and universities, this emphasis on casual attire is a daily occurrence, not just reserved for Fridays.

　　Sports and Recreation(運動娛樂)

　　Large numbers of Americans watch and participate in sports activities, which are a deeply ingrained part of American life. Americans use sports to express interest in health and fitness and to occupy their leisure time.

　　Basketball is another sport that is very popular as both a spectator and participant sport. Many people play basketball in amateur leagues and organizations. It is also common to see people playing basketball in parks and local gymnasiums around the country.

　　At the end of the 20th century, Americans were taking part in individual sports of all kinds—jogging, bicycling, swimming, skiing, rock climbing, playing tennis, as well as more unusual sports such as bungee jumping, hang gliding, and wind surfing. As Americans enjoy more leisure time, and as Hollywood and advertising emphasize trim, well-developed bodies, sports have become a significant component of many people's lives.

　　Many Americans now invest significant amounts of money in sports equipment, clothing, and gym memberships. As a result, more people are dressing in sporty styles of clothing. Sports logos and athletic fashions have become common aspects of people’s wardrobes, as people need to look as though they participate in sports to be in style.

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