It happened to me recently. I was telling someone how much I had enjoyed reading Barack Obama's Dreams From My Father and how it had changed my views of our President. A friend I was talking to agreed with me that it was ,in his words, “a wonderfully written book ”. however, he then went on to talk about Mr. Obama in a way which suggested he had no idea of his background at all .I felt that I was talking to a book liar.

    And it seems that my friend is not the only one. Approximately two thirds of people have lied about reading a book which they haven't .In the World Book Day's “Report on Guilty（愧疚的） Secrets”, Dreams From My Father is at number 9.The report lists ten books, and various authors, which people have lied about reading, and as I'm not one to lie too often (I'd hate to be caught out ),I'll admit here and now that I haven't read the entire top ten .But I am pleased to say that, unlike 42 percent of people, I have read the book at number one ,George Orwell's 1984.I think it's really brilliant.

    The World Book Day report also has some other interesting information in it. It says that many people lie about having read Jane Austen, Charles Dickens, Fyodor Dostoevsky(I haven't read him, but haven't lied about it either )and Herman Melville.

    Asked why they lied, the most common reason was to “impress” someone they were speaking to. This could be tricky if the conversation became more in –depth!

    But when asked which authors they actually enjoy, people named J.k. Rowling, John Grisham, Sophie Kinsella(ah, the big sellers, in other words).Forty-two percent of people asked admitted they turned to the back of the book to read the end before finishing the story(I'll come clean: I do this and am astonished that 58 percent said they had never done so).

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    It seems the more time we have, the longer we put off living the life we see in our heads, because we feel like we've got some time to kill.

    I know where you think I'm going with this, and I also know you've heard it all before: seize the day, make the most of it, live life to its fullest, and so on. But that's the problem. You've heard it all before. These ideas have their impact and have become a cliché. Luckily, that's not my thing.

    The real answers wake something up inside you. They make you think. That's what I want to give you today, the story of Bobby Darin, which wakes you up to the truth.

    If you haven't heard of the man, I know you've heard his songs. Among his many hits are Mack the Knife, Beyond the Sea, Dream Lover, and Splish Splash.

    If seven years, Darin had several top ten hit songs, was nominated(提名) for four Grammy Awards (winning two), nominated for four Golden Globes (winning one), and even nominated for an Oscar.

    So what was his secret?

    All his life, Darin had a heart condition that developed from a childhood illness. The doctors at the time said he would be lucky to live to 16. In other words, his time was limited. And this was secret. He knew the truth. He knew that we all have such a hard time accepting: Life is short. You can't just say it; you can't just hear it. You have to know it, believe it, and feel it. Because Darin knew his time was limited, he packed as much life as he could into the time he had. But he had an unfair advantage. He knew, without a doubt, his time was limited.

    There was no fooling himself, no putting it off. It was now or never.

    Maybe you've heard about the saying, “A bird with a broken wing will never fly as high. I'm sure that T. J. Ware was made to feel this way almost every day in school.

    By high school, T. J. was the most famous troublemaker in his town. He got into lots of fights. He failed almost every exam but was passed on each year to a higher grade level. Teachers didn't want to have him again the following year.

    When I showed up to lead the first training for a leadership retreat, a program designed to have students become more involved in their communities, the community leaders told me about T. J. Ware, the boy with the longest arrest record in the history of town. Somehow, I knew that I wasn't the first to hear about T. J.'s darker side as the first words of introduction.

    At the start of the retreat, T. J, didn't readily join the discussion groups and didn't seem to have much to say. But when his group started a discussion about positive and negative things that had happened at school that year, he joined in and had clear thoughts on those situations, and the other students in his group welcomed his comments. Suddenly, T. J. felt like a part of the group, anti soon he was treated like a leader. He was saying things that made a lot of sense, and everyone was listening. By the end of the retreat he had joined the Homeless Project team. He knew something about poverty, hunger and hopelessness. The other students on the team were impressed (打动) with his ideas and love for the homeless. They elected T. J. vice-chairman of the team.

    Two weeks later, the Homeless Project team organized a communitywide service project—a giant food drive. Seventy students led by T. J. collected a school record: 2,854 cans of food in just two hours, enough to take care of poor families in the area for 75 days. The local newspaper covered the event with a full-page article the next day. T. J.'s picture was up there for doing something great.

    T. J. reminds us that a bird with a broken wing only needs mending. But once it has healed, it can fly higher than the rest.

    One morning, my newspaper wasn't delivered on time. Since I always brought it to work, it upset me that I would have to pick one up on my way to work. After breakfast, I was already running late, but figured I could make it if I hurried.

    As I pulled into the parking lot of the store, I noticed a young man in a wheelchair who seemed to be struggling. “Someone else will stop and help him,” I thought.

    However, no one stopped. I got out, and walked over to see what the trouble was.

    “Is there anything I can do?” I asked. It was then that I noticed he wasn't able to speak, and was still struggling with the chair.

    I looked down at the chair and noticed that the clamps (夹具) holding the electronic keyboard had apparently become loose causing the equipment to slip down, out of his reach.

    I pulled it back into place and then re-tightened the clamps. He hit a key on the keyboard. An electronic voice told me, “Thank you.” He then found the control that steered (操纵) the chair, turned and left.

    I got back in my car and headed off to work, completely forgetting my newspaper. As I drove, I felt a deep gratitude (感激). I was truly blessed to have the physical abilities that allow me to live a normal life. Here was this young man who relied on machines to get around and communicate. He probably dreamed about doing all the things that I thought were normal and simple.

    It's funny; fifteen minutes before that happened, I was whining because my morning paper hadn't arrived on time. I was glad I helped the young man, because he helped me gain a new viewpoint on everything I had in my life.

    The Intelligent Transport team at Newcastle University have turned an electric car into a mobile laboratory named “DriveLAB” in order to understand the challenges faced by older drivers and to discover where the key stress points are.

    Research shows that giving up driving is one of the key reasons for a fall in health and well-being among older people, leading to them becoming more isolated(隔绝) and inactive.

    Led by Professor Phil Blythe, the Newcastle team are developing in-vehicle technologies for older drivers which they hope could help them to continue driving into later life.

    These include custom-made navigation(导航) tools, night vision systems and intelligent speed adaptations. Phil Blythe explains: “For many older people, particularly those living alone or in the country, driving is important for preserving their independence, giving them the freedom to get out and about without having to rely on others.”

    “But we all have to accept that as we get older our reactions slow down and this often results in people avoiding any potentially challenging driving conditions and losing confidence in their driving skills. The result is that people stop driving before they really need to.”

    Dr Amy Guo, the leading researcher on the older driver study, explains, “The DriveLAB is helping us to understand what the key points and difficulties are for older drivers and how we might use technology to address these problems.

    “For example, most of us would expect older drivers always go slower than everyone else but surprisingly, we found that in 30mph zones they struggled to keep at a constant speed and so were more likely to break the speed limit and be at risk of getting fined. We're looking at the benefits of systems which control their speed as a way of preventing that.

    “We hope that our work will help with technological solutions(解决方案) to ensure that older drivers stay safer behind the wheel.”

    Humans and many other mammals have unusually efficient internal temperature regulating systems that automatically maintain stable core body temperatures in cold winters and warm summers. In addition, people have developed cultural patterns and technologies that help them adjust to extremes of temperature and humidity (湿度).

In very cold climates, there is a constant danger of developing hypothermia, which is a life-threatening drop in core body temperature to below normal levels. The normal temperature for humans is about 37.0℃. However, differences in persons and even the time of day can cause it to be as much as 6℃ higher or lower in healthy individuals. It is also normal for core body temperature to be lower in elderly people. Hypothermia begins to occur when the core body temperature drops to 34.4℃. Below 29.4℃, the body cools more rapidly because its natural temperature regulating system usually fails. The rapid decline in core body temperature is likely to result in death. However, there have been rare cases in which people have been saved after their temperatures had dropped to 13.9-15.6℃. This happened in 1999 to a Swedish woman who was trapped under an ice sheet in freezing water for 80 minutes. She was found unconscious, not breathing, and her heart had stopped beating, yet she was eventually saved despite the fact that her temperature had dropped to 13.7℃.

In extremely hot climates or as a result of uncontrollable infections, core body temperatures can rise to equally dangerous levels. This is hyperthermia. Life-threatening hyperthermia typically starts in humans when their temperatures rise to 40.6-41.7℃. Only a few days at this extraordinarily high temperature level is likely to result in the worsening of internal organs and death.