I lived in a big city. It's noisy arid dirty and I got very tired. At the weekends I like to leave the city and get some fresh air and a good rest. A few weekends ago I decided to see my parents. I was really looking forward to it.

    My parents live a long way away. I went to see them with James, a friend, and we drove down on Friday night. In the middle of the trip it began to rain. The roads became very wet and it was difficult to drive. We arrived home just after midnight, feeling tired. The next morning it was still raining. James took his car to the local garage which was very good.

In the afternoon the weather became better. We wanted to go for a drive. My parents lent us their car. That was no good. Their car didn't work! We rang the garage. "Oh, no." they said, "your car won't be ready until tomorrow." So it wasn't possible to go for a drive. We decided to play a word game. When we didn't agree about a word we looked for a dictionary. It wasn't there. Suddenly my mother remembered. "I lent it to your sister. She took it with her when she left." The word game wasn't any good without a dictionary.

    On Sunday my mother dropped a suitcase on her foot and wig had to hire a taxi to take her to hospital. When James and I drove back we got stuck in a traffic jam (交通阻塞). Next time I want to have a rest. I'll stay in the city!

    Two summers ago I was about to turn fifty and wanted to do something I'd never done before. My daughter Bailey thought skydiving (跳伞) would be perfect for me. I can promise you that of all the things I was thinking of doing, jumping out of an airplane never came close to making the list. As I age, I seem to have developed a growing fear of heights.

    After several requests from my daughter, I finally said yes and she looked almost shocked. I told a friend what we were doing, then we set off. We had a 3-hour drive to the jump site. We drove through some beautiful countryside, but then we passed a small cemetery(墓地). Then we passed another cemetery and another one. I asked if so many people died jumping out of airplanes in this area that they needed to keep building more cemeteries to bury all the bodies!

    As we squeezed into the little plane, I tightly held the right hand of my partner Ronnie. The short ride to altitude was cruel for me. As Bailey stepped to the door, she looked back at me and said “Dad, I'm sure you can do it!” I said yes as she rolled out. I immediately looked behind me and said “RONNIE I AM NOT FEELING GOOD!” He said, “It's going to be great. Besides, it's too late now anyway”, and we jumped out.

    The next five minutes were some of the most amazing of my life. It was so beautiful and peaceful—except for the parts where I was screaming. I prayed to God for the parachute (降落伞) to open, but mostly I told Him how thankful I was for my life and being with me through good and bad.

    As my fortieth birthday approaches, inevitable as a new hair-do, I realize how many women friends I've had over the years: Most have come and gone with the changes of life, just like the latest shoe fashions waltz in and out of my closet.

    Some of my friends, like some of my shoes, were silly mistakes. They never did fit properly, and they always felt slightly “off”, no matter how hard I tried to fit my feet into them. Others were my absolute favorite for a while, but they wore out or wore off. All style and no substance; the quality just wasn't there.

    Then there are my true friends—the ones who, like a pair of fine shoes, never go out of style or out of favor, whose appeal and value just increase with wear and time. These are friends who stay in touch and stand by me—as if they and I have never gone off to a new state, or a new job. Physical distance does not separate us; time does not change the fundamental fact of our friendship; the wear and tear of life does not stop us. The sole still support us; the colors and lines still please us; the uppers, still strong but gown son, gently bent around feet. Our connection is securely fastened, unaffected by the whirlwind of changes we've each been through, even when life carries us in different directions.

    If the comparison fits...

    Deborah is the evening shoe, elegant and lovely. She appreciates the finer things, choose only the best, and still looks polished long after the rest of us have drooped. She is a study in elegance and knows the difference between bone, and winter white. From this splendid treasure, I've come recognize my own appreciation for the finer things in life—and to the realization that I deserved them.

    Jane is pair essential, timeless pumps that I wear often and would be lost without. With this classic, my basic needs and comfort level are assured—leaving me time and energy for fun. I can move gracefully from day to night, from work to play, from jokes to discussion. My step is light; laughter comes easily and I am ready for adventure.

    Georgiana is my pair of standard white Keds—familiar, comfortable and good for all seasons. I've had them since long before. They are part of my childhood. They take me home, and I am a kid again diving into the ocean on a hot summer day. They have been up the hill and through the mud with me. They keep me moving forward, even when putting one foot in front of the other feels like the hardest thing I've ever done. I know I can slip them tomorrow and after. I am indebted to these lovely worn sneakers.

    In the shoe rack of life, these are the friends I cherish. They are the base upon which I stand. They accompany me on my chosen path, regardless of where it leads or how bumpy or how humpy or winding it gets.

    Imagination and fantasy can play an important role in achieving the things we fear. Children know this very well. Fred Epstein, in his book If I Make It to Five, tells a story he heard from one of friends about Tom, a four-year-old boy with a cancer in his back bone. He came through several operations and a lot of pain by mastering his imagination.

    Tom loved to pretend, and he particularly loved to play superheroes, Dr. Epstein explained that it was actually a brilliant way for his young mind to handle the terrifying and painful life he led.

    The day before his third trip to the operating room, Tom was terribly afraid. ”Maybe I could go as Superman,”he whispered to his mom. Hearing this, the mother hesitated for a while. She had avoided buying the expensive costume（戏装），finally she agreed.

    The next day Tom appeared as the powerful Superman, showing off through the hospital halls and coolly waving his hand to the people greeting him along the way. And Tom, with the strength of his fantasy, successfully made it through the operation.

    The power of imagination need not be reserved for children only. We all have the power to use our fantasies to attempt things we never thought possible, to go through those things that seem impossible, and to achieve what we never believed we could. Just as Dr. Epstein puts it, ”If you can dream it, you can do it.”

    It doesn't mean that you should dress as a superhero for your next job interview. But, next time you are texted in a way that seems impossible, imagine what it would take to overcome it .Become the person you need to become to win over your challenge and do it in your mind first. So, let your imagination run wild, and dare to dream.

    A killer whale(虎鲸) that can copy words such as “hello” and “bye-bye” is thought to be the first of its kind to copy human speech.

    The female killer whale learned to “speak” some human words by copying a trainer at a park in France. The animal's ability includes speaking the name “Amy” and “one, two, three”.

    Whales and dolphins are among the few animals except humans that can learn to produce a sound just by hearing it. “It is not often seen,” said Dr Josep Call, a co-researcher on the study. “Humans are good at it…Interestingly, the animals that can do best are marine mammals(海洋哺乳动物).” The researchers start to find out whether killer whales could learn new words by copying others. They studied a female named Wikie at Marineland Aquarium in Antibes, France. She was taught to speak human words.

    Dr Jose Abramson, a co-researcher on the study, said basic “conversations” with Wikie may one day be possible. He said,” It has been done before with a famous grey parrot and dolphins using American sign language(手势语).” However, he said they have to be careful about introducing human ideas on animals, as there is more to learn by trying to understand the natural way each kind communicates in its own environment. Wikie made sounds in water, which may be quite different.

    Dr Alex Thornton, senior speaker at the University of Exeter, said they still don't fully understand why some animals learn to copy. Some animals copy sounds to attract possible partners, while others copy sounds to become a member of a group. “Some whales, for example, learn their calls from one another to mark them out as members of their social group,” said Dr Thornton, who doesn't join in the research.

    The Chinese invented paper in 105 A. D. They mixed the bark of a tree and rags (破布) with water, put a screen into the mixture, and lifted out a thin piece of wet paper. They dried the paper in the sun.

    The Chinese kept their secret of how to make paper until a war with Muslims in the ninth century. The art of papermaking soon spread throughout the Muslim world.

    The Mayan Indians in Central America and Pacific Islanders also discovered how to make paper, but their knowledge never spread to the rest of the world.

    For centuries, all paper was made by hand. Rags were the main material. Then a French scientist discovered that people could make paper from wood, too. Finally, in the eighteenth century, a Frenchman invented a machine to make paper from wood.