ÀúÄêרËÄÕæÌâdictationÔ­ÎÄ(2)

Disappearing Forestsª¥(2002)

The world¡¯s forests are disappearing. As much as 1/3 of the total tree cover has been lost since agriculture began some 10,000 years ago. The remaining forests are home to half of the world¡¯s species, thus becoming the chief resource for their survival. Tropical rain forests once covered

12% of the land of the planet, as well as supporting at least half of the world¡¯s species of plants and animals. These rain forests are home to millions of people. But there are other demands on them. For example, much has been cut for timber. An increasing amount of forest land has been used for industrial purposes or for agricultural development such as crop-growing. By the 1990¡¯s less than half of the earth¡¯s original rain forests remained, and they continued to disappear at an alarming rate every year. As a result the world¡¯s forests are now facing gradual extinction.ª¥

Salmon (2003)

Every year, millions of salmon swim from the ocean into the mouths of rivers and then steadily up the rivers. Passing through waters, around rocks and waterfalls, the fish finally reach their original streams or lakes. They dig out nests in the riverbed and lay their eggs. Then, exhausted by their journey, the parent salmon die. They have finished the task that nature has given them. Months, or years later, the young fish start their trip to the ocean. They live in the salt water from 2-7 years, until they, too are ready to swim back to reproduce. Their life cycle helps man provide himself with a basic food-fish. When the adult salmon gather at the river mouths for the annual trip up the rivers, they are in the best possible condition, and nearly every harbor has its salmon fishing fleet ready to catch thousands for markets.

Money (2004)

Money is accepted across the world as payment for goods or services. People use money to buy food, clothes and hundreds of other things. In the past, many different things were used as money. People on Pacific islands once exchanged shells for goods. The Chinese used cloth and knives. In Africa, elephant tusks or salt were used. Even today, some people in Africa are still paid in salt. Coins were first invented by the Chinese. Originally, they were round pieces of metal with a hole in the center, so that a piece of string could keep them together. This made doing business much easier, but people still found coins inconvenient to carry when they wanted to buy something expensive. To solve this problem, the Chinese again came up with the solution. They began to use paper money for coins. Now paper notes are used throughout the world.

The Wrist Watch £¨2005£©

It is generally believed that wrist watches are an exception / to the normal sequence in the evolution of man's jewelry. / Reversing the usual order, they were first worn by women, / and then adopted by men. / In the old days, queens included wrist watches among their crown jewelry. / Later, they were worn by Swiss workers and farmers. / Until World War I, Americans associated the watch with fortune hunters. / Then army officers discovered that the wrist watch was most practical for active combat. / Race car drivers also loved to wear wrist watches, / and pilots found them most useful while flying. / Soon men dared to wear wrist watches without feeling

self-conscious. / By 1924, some 30 percent of man's watches were worn on the wrist. / Today, the figure is 90 percent. / And they are now worn by both men and women / for practical purposes rather than for decoration.

The Internet (2006)

The Internet is the most significant progress in the field of communications. / Imagine a book that never ends, a library with a million floors, / or imagine a research project with thousands of scientists / working around the clock forever. / This is the magic of the Internet. / Yet the Internet has the potential for good and bad. / One can find well-organized, information-rich websites. / At the same time, one can also find wasteful websites. / Most websites are known as different Internet applications. / These include online games, chat rooms (chatrooms) and so on. / These applications have great power, too. / Sometimes the power can be so great / that young people may easily become victims to their attraction. / So we need to recognize the seriousness of the problem. / We must work together to use its power for better ends.