Summarization
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     Researchers tested obese men before and after they joined a one-year modest walking plan. The result: Their blood pressure improved and the amount of body fat around their abdomen - the dangerous kind of fat that leads to higher rates of heart disease and diabetes - significantly decreased.
The surprising emodest walking has on health.

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     When you have to explain how something is done，you usually follow a chronological sequence and give a step-by-step description．As the steps must occur one after another, the exact order in which they are carried out is most important．
In giving explanations，p description is very important．

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     Some people worry about the violence in TV programs and their effect on young people. Others consider that these same programs are an opportunity for us to release our stronger emotion, our feelings of anger or anxiety. Most people would agree though, that extreme violence should be kept away from children.
Though interpreted differently, most people still agree that children be kept away from v.

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     Harsh garden chemicals kill beneficial organisms as well, including butterflies, ladybugs, and bees, all of which help our gardens grow and stay healthy. More troubling is that garden chemicals can leach into the groundwater, where they can leave a toxic residue that poisons fish, small plants, and waterfowl.
Garden chemicals can be quite h.

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     New climate simulations from NASA show that under the warmer global temperatures of the 20th century, water vapor in the atmosphere took longer than normal to fall out of the sky as rain, snow and other precipitation. Generally speaking, the amount decreased over land but increased over oceans.
Warmer weather p less rain on land but more at sea.

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     There are 15 million of us who fly across multiple time zones every year, with 500,000 of us in the air at any given moment. And for those of us who fly more than a couple of time zones from home jet lag can be a serious challenge.
Millions of people sfrom jet lag every year.

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     Surveys show that the average office worker sends and receives 108 e-mails a day. Even when we manage to clear out the in-box and escape our desks, most of us are still reachable by cell phone or some other handheld device. These gadgets add convenience and fun to our lives, but there’s a price to be paid.
With new technologies work t up more of people’s private time.

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     Quite a number of people believe that women’s abilities are not so good as men’s．As a result，most employers do not choose women to be in charge of important projects．But I think such view is ridiculous．Everyone is born equal and the ability is cultivated later through education，social action and communication.
The prevalent a towards working women should be changed.

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     Health care workers in Senegal, Namibia, and other African nations usually walk miles over dusty roads to deliver food, medicine, and companionship to people with HIV/AIDS. But with the donation of 1,500 single-speed bicycles by Bike Town Africa, caregivers now visit as many as six times more people in need.
Care workers now help more people with d bicycles.

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     As we all know, in this rapidly changing world，competition is here and there，especially for high positions．For that reason，it is crucial for those who operate the company or manage the city, town and so on to make decisions，so the work itself needs high quality people to make things better and better．
People should improve themselves to qualify for key positions in politics and b.

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     Consumed by sorrow after their son Peter died in the second plane to hit the World Trade Center, Sally and Donald Goodrich of Bennington, Vermont, fell into lives of silent despair. Sally began to drink; then, diagnosed with cancer, she considered taking her own life.
Sally considered s because of cancer and loss of her son.

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     Interest in dreams is as old as mankind himself. Mankind’s oldest book the Bible is full of them, with the first recorded dream occurring around 1900 B.C. The Greeks, Romans and Babylonians all put great hope in dreams, especially on the eve of battle. Today the interest in dreams and their interpretation is no less profound. 

Human beings have long been a by dreams.

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     There is too much monkey business in Hong Kong, and the government is determined to do something about it. Packs of wild monkeys are invading parks and neighborhoods in greater numbers, aggressively begging for food and sometimes snatching bags from frightened passersby.
Hong Kong c are harassed by monkeys.

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      You make a meal to take to work and then you forget it. Has this ever happened to you? Or you see someone you know well but you cannot remember his name. Researchers of A    lzheimer's said they now have proof that self-reported minor memory loss sometimes led to greater mental problems six years later. 

Memory d may be an early sign of Alzheimer's.

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     Genetic Engineering is quite a new science which is a rapidly expanding and developing technology. It has the potential for many useful developments in the fields of medicine, agriculture, industry and conservation. However, balanced with this, it has the potential to produce catastrophic problems.
Genetic Engineering can bring problems as well as b to people.

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     Agriculture experts worry that a severe drought that began in June may damage the rice harvest in central and eastern China this year, but add that it's too early to know whether the entire country will be affected. 

Drought takes toll on rice c.

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     Are people less happy or more happy the older they get? If you answered more happy, then you were right based on a study in 2008. It found that people generally become happier and experience less worry after age fifty. In fact, it found that by the age of eighty-five, people are happier with their life than they were at eighteen.
The r between age and happiness. 

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     Working in more flexible and friendly environments can improve the balance between students, schoolwork and their lives. Not having to commute adds extra time to the day, as much as several hours a week for some students. Thus distance education can also reduce stress, allowing students extra time to study.
Distance education can improve students’ l，motivation and interactivity.

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     Women's soccer is becoming more popular around the world. But in most places, women still have less training and financial support than male players. A program held every summer in Berlin aims to improve opportunities for women. It brings soccer clubs from Africa and the Middle East to Germany for a week of games and discussions. 

An i in the popularity of womens soccer.

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     Nowadays sophisticated solar-energy systems called photovoltaics produce electricity from the sun. Photovoltaics run $14,000 to $20,000, but these systems can substantially cut homeowners’ electric bills, depending on sun exposure and electric rates. Excess energy can even be sold back to the electric company for more savings.
Expensive photovoltaics can help save a lot in the long r.