As a boy, Charles Robert Darwin(达尔文) collected anything that caught his interest: insects, coins and interesting stones. He was not very clever, but Darwin was good at doing the things that interested him.

    His father was a doctor, so Darwin was sent to Edinburgh to study medicine, and was planned to follow a medical career. But Charles found the lectures boring. Then his father sent him to Cambridge University to study to be a priest. While at Cambridge, Darwin's interest in zoology and geography grew. Later he got a letter from Robert FitzRoy who was planning to make a voyage around the world on a ship, the Beagle. He wanted a naturalist to join the ship, and Darwin was recommended(推荐). That voyage was the start of Darwin's great life.

    As the Beagle sailed around the world, Darwin began to wonder how life had developed on earth. He began to observe everything. After he was home, he set to work, getting his collection in order. His first great work The Zoology of the Beagle was well received, but he was slow to make public his ideas on the origin of life.

    Later Darwin and Wallace, another naturalist who had the same opinions as Darwin, produced a paper together. Darwin's great book “On the Origin of Species by Means of Natural Selection”(《物种起源》) appeared. It attracted a storm. People thought that Darwin was saying they were descended from monkeys. What a shameful idea! Although most scientists agreed that Darwin was right, the Church was still so strong that Darwin never received any honors for his work.

    Afterwards, he published another great work, The Descent of Man. His health grew worse, but he still worked. “When I have to give up observation, I shall die,” he said. He was still working on 17, April, 1882. He was dead two days later.

    I used to think education was the most important thing in my life. Recently my attitude has begun to change, although I still hold that it is essential for everyone in the world today. As a top junior student in my college, I was asked to make a speech on how to learn English well. Standing in front of the audience and facing so many freshmen, I was trembling. I didn't remember any word that I had prepared. I ran out of the conference room without finishing my speech, leaving everyone puzzled. I cried that night in my room, feeling that I was a loser. Studying takes up so much of my time that I feel unable to really develop myself. I am just storing knowledge, yet I fail to communicate with others. I have received many awards in school, but they don't necessarily reflect anything about me. I don't know how to socialize. When I leave school I fear I will be of no use to society.

    I realize that everyone has his own way of living. I want to change my lifestyle. Of course I will keep studying. Yet I plan to look for a part-time job, which might turn out to be a good chance to get to know society. I still believe that working my hardest makes me happy. I will still stay on in college. But I will not allow it to shelter me from the real world.

    Researchers say getting a good night's sleep is probably the best tool for memory and learning. But short periods of sleep may help our brains work better, says a recent study on napping. And taking a nap  may also help old adults fight off age-related memory loss.

    CDC, an American scientific organization, found that 50 to 70 million Americans have chronic（长期的）sleep disorders. So, someone who naps as a way of paying off a sleep debt may not experience the same improvements from napping as a well-rested person would. Also, that only children, the very old, sick or  lazy people nap is not an uncommon opinion.

    Researchers recently looked at information provided by nearly 3,000 Chinese adults, aged 65 years or older, to learn if napping after a mid-day meal had any effect on the mental performance of the subjects.

    First, they asked the people if they napped and for how long. Then, based on their answers, researchers put them into four groups: non-nappers (0 min), short nappers (≦30 min), moderate nappers (30-90 min), and extended nappers (≧90 min).  Nearly 60% of the people said they did take a nap after lunch and that   their naps lasted anywhere from 30 to 90 minutes. Most of the subjects said they napped for about an hour.

    The study found that people who took an hour-long nap did much better on mental tests than those      who did not nap. The hour-long nappers also did better on the tests than those who napped for shorter and longer periods. In this study, it seemed that the most effective nap lasted for about an hour, but not much longer.

    Yet Doctor Michael Twery notes that an hour long nap may be too long for young, healthy adults. 30 minutes is enough to remove the pressure to sleep and will help us feel more awake.

    My first week in the United States was a cultural shock. Everything felt new to me, including the style of conversation, the community I lived in and even the type of food people ate.

    In our community back home, people eat mutton and chicken. Pork and beef are also common among other communities, but eating beef is taken as an illegal act. Unlike Nepal, eating beef is common in the West where most of the people follow religions other than Hinduism.

    Food is just an example. When people move from one part of the world to another, they should adapt（适应）themselves to the new culture. For example, going to the bars or getting drunk is not acceptable in my community, but it is common in the US after a certain age.

    I was raised in a traditional Hindu family in Nepal. We have a conservative（保守的，谨慎的）opinion towards marriage. Arranged marriages（包办婚姻）are common in which families decide whether the two should get married. Free love marriages are not allowed and are seldom seen. Same-sex marriage is also considered impossible.

    To me, culture is a matter of habit. The culture is so deep-rooted in people's minds that most people are against changes. It is always easy for them to do what they have been doing throughout their life. It may be difficult for anyone to adapt to a new culture.

    However, with travel being an unavoidable thing for modern people, one always comes across different cultures. In such cases, one should be respectful and adaptive to the culture other people follow. The world is always a better place to live in when we have spaces for people of all cultures.

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    Nowadays more and more people like to travel, especially when vacations come. A great number of people rush out of their homes or companies to travelling spots. They either drive or take a bus, a train, a ship and so on. Some even ride bikes.

    However, there is another way of travelling—poorism. People have a tour in the poorest areas of the world. Some people may take one-day poorest tour, and some even pay to stay in very poor neighborhoods to experience the lowest living standards in the world. Poorism tours take place around the world, and not just in the third world countries. You can, for instance, tour New York neighborhoods in the Bronx, in the Bund of Shanghai. Such tours can take people into the heart of poor areas within large and in some rich cities. These tours may awaken people to pay more attention to long-standing poverty, or the effects of war.

    Some suggest that tours in the poor areas can raise social care. And the money from the tour can be donated to help the people there.