TaIL Spin

    Two dolphins race around in a big pool in the Ocean Park. The smaller dolphin Grace, shown off a few of her tricks, turning around and waving hello to the crowd. The most amazing thing about her, however, is that she's even swimming at all. She doesn't have a tail.

Grace lost her tail as a baby when she got caught up in a fish trap. When the dolphin arrived at the Ocean Park in December 2005, she was fighting for her life. “Is she going to make it?” Her trainer, Abbey Stone, feared the worst. Grace did make it — but her tail didn't. She ended up losing her flukes and the lower part of her peduncle.

Over the past six years, she has learned to swim without her tail. Dolphins swim by moving their flukes and peduncle up and down. Grace taught herself to move another way—like a fish! She pushed herself forward through the water by moving her peduncles from side to side.

    The movement put harmful pressure on Grace's backbone. So a company offered to create a man-made tail for her. The tail had to be strong enough to stay on Grace as she swam but soft enough that it wouldn't hurt her.

    The first time Grace wore the artificial tail. She soon shook it off and let it sink in the bottom of the pool. Now, she is still learning to use the tail. Some days she wears it for an hour at a time, others not at all. “The tail isn't

necessary for her to feel comfortable,” says Stone, “but it helps to keep that range of motion(动作) and build muscles(肌肉).”

    Now, the dolphin is about to get an even happier ending. This month, Grace will star in Dolphin Tale, a film that focus on her rescue and recovery. Her progress has inspired more than just a new movie. Many people travel from near and far to meet her. Seeing Grace swim with her man-made tail gives people so much courage.

    It seems that in many places storms visit more often. When a storm is coming, most people leave the area as quickly as possible and head for safety. But there are a few people who will get into their cars and go straight for the center of the storm. These people are willing to risk being killed by floods or 100-kilometer-an-hour winds for the excitement of watching the storm close up.

    "Storm chasing" is becoming an increasingly popular hobby, especially in the Midwest of the United States, where there are frequent storms between March and July. A storm chaser begins the day by checking the Internet for the latest weather reports, and then drives up to 1,000 kilometers to where the storm will be and waits for it to develop.

    Although anyone can do it, storm chasing is extremely dangerous. The power of a big storm can throw a cow into the air or destroy a whole house in seconds. Storm chasers are also often hurt in accidents caused by driving in a heavy rain. If you are a beginner, it is much safer to join a group for storm-chasing vacations during the storm season.

    Even then, storm chasing is not all adventure and excitement. "Storm chasing is 95% driving," says Daniel Lynch, who spends most of his summer storm-chasing. "Sometimes you can sit around for hours waiting for something to happen, and all you get is blue sky and a few light showers."

    However, for storm chasers, it is all worth it. "When you get close to a storm, it is the most exciting sight you will ever see in your life," says Jasper Morley. "Every storm is an example of the power of nature. It is the greatest show on Earth."

    A woman was sitting by herself in a movie theatre. The movie she was about to set was a musical version(版本)of a very successful book that had sold a million copies that year.

    As the woman was waiting for the movie to begin, she noticed that the theatre was very crowded but the two seats next to her were empty.

    Suddenly a large man carrying a big fur coat walked down the aisle(走廊) and sat down, placing the fur coat on the seat next to her.

    When the lights went out, the fur coat bean to move, and the woman realized it was not a coat but a large furry dog. He was sitting up in the seat, watching the movie screen with great interest. As soon as the movie started, the dog began to nod his head and beat his paws (爪) in perfect time to the music.

    When the movie was over, the woman turned to the man and said, “Excuse me, sir, but I've never seen Such a well-behaved dog in a movie theatre before. Does he go to the movies often?”

    “Oh, yes,” replied the man.

    “And he seemed to enjoy everything so much,” she said, “It was just amazing!”

    “As a matter of fact, it surprised me too.” said the man. “He hated the books！”

    A California family drives a car that could help protect the environment. When Jon and Sandy go to the store or to their daughters' soccer games, they drive in high-tech style. They drive a $1 million, fuel-cell-powered car. It may be the world's most expensive car and one of the most environmentally friendly cars. The FCX is the first fuel-cell-powered car to be used by a family anywhere in the world. The FCX uses hydrogen and oxygen for fuel. Car makers have been working to develop vehicles that are better for the environment. They are developing cars that use fuel other than gasoline.

    And then what is fuel cell technology? Fuel cell technology works by changing the chemicals hydrogen and oxygen into water. This process produces electricity, and water vapor which comes out of the exhaust pipe. Most cars release dangerous gases such as carbon monoxide and carbon dioxide. Many scientists say these gases are major contributors to global warming. “The FCX is driven just like any other vehicle on the road, but without the gases which pollute the environment,” scientists say. Fuel cell technology has been around since the 1800s, but scientists have yet been to perfect it. They say it may take years before the technology is ready for widespread use. Another earth-friendly car is already on the market. Hybrid cars use both gasoline and an electric motor. They are becoming more popular with customers because they cut pollution and improve fuel efficiency.

    When people find themselves in difficult conflicts, they often turn to mediation(调解). Mediator are advised to listen attentively, avoid favoring the ideas of one party, and make both sides feel at ease. Surprisingly, new research that my colleagues and I conducted shows that, to effectively help people settle their conflicts, mediators should adopt a hostile(敌对的) attitude rather- than a calming one. A hostile mediator, we find, brings better results than a nice one

    Why would adding more negativity to an already hostile situation prove beneficial? Consider how parents typically react when they can't get their children to stop quarreling: "I don't care who started it, both of you, go to your rooms!" At first sight, a calm mediator seems likely to be more effective. But as anyone with brothers or sisters knows, parents' seemingly unsympathetic treatment of the situation can have an unusual effect,

    In our research, we created situations in which pairs of negotiators were part of a heated conflict. In some cases, the mediator had a "nice" approach-calm and polite. In others, he was hostile-aggressive and somewhat rude. Across different types of conflicts, we found that negotiators were more willing and able to reach an agreement in the presence of a hostile mediator than in the presence of a nice one.

The main result of the test is not that hostility pays off. In fact, recent research has documented the social costs of negative behavior. For example, being the target of rude behavior reduces people's performance on a variety of tasks. Other research shows the social benefits of positive behavior. People are more likely to close deals and become future business partners.

    Even with the widespread social benefits of positive behavior and costs of negative behavior, hostility can pay off in certain situations.

Dear Students,

    I am delighted to be your guest.

    I would like to tell you about myself. I have been a news reporter for the past fifteen years. I chose this job so I could travel the world, but the job has taught me many unforgettable lessons. The work is sometimes difficult. I have seen famines, wars, earthquakes, poverty and death. But I have also seen courage, hope and happiness.

    In India, I visited a city where there were many homeless children. Some were as young as four years old. They lived in the streets and survived by begging or stealing. But then a wonderful lady called Rosa opened a home for them. Within one year, she was looking after two hundred children. She clothed them, fed them, and taught them. She gave them hope.

    Another time, I was in Turkey after a terrible earthquake, in one place. I found an old lady whose house was in ruins, her son was missing and rescuer workers said there was no chance that he was still alive. But the old lady did not give up hope. For four days, she moved heavy stones one at a time by herself. She did not stop until she found her son. He was alive.

    Here in China, I met a young boy with a serious condition. He had undergone twenty operations and spent nearly his whole life in hospital. I thought he would be sad, but when I met him, his smile was so warm and welcoming.

    In life, we need role models that we can admire and learn from. When my life is difficult, I try to remember the courage and goodness of these three people.