One form of social prejudice against older people is the belief that they cannot understand or use modern technology. Activities like playing computer games, going on the Net and downloading MP3s are only for the youngsters. Isn't it unfair that older people enjoying a computer game should be frowned(皱眉) upon by their children and grandchildren?

    Nowadays older people have more control over their lives and they play a full part in society. Moreover, better health care has left more people in their sixties and seventies feeling fit and active after retirement. Mental activity, as well as physical exercise, can contribute to better health. Playing computer games is a very effective way of exercising the brain.

    When personal computers were first introduced, most older people didn't believe they would ever familiarize themselves with it. Now computers have been around for a few generations and retired people have gradually become more relaxed about using them for fun. Gamers over 65 prefer playing puzzle games and card games. Kate Stevens, aged 72, says: “I find it very relaxing. It's not very demanding, but you still need to concentrate.”

    Another development that has favored “grey games” is a change in the type of videogames available on the market. There's a greater variety of games to choose from, including more intellectual and complex strategy(策略) and simulation(模拟) games. Internet Chess and Train Simulator are among the most popular of these. Train Simulator is based on real-world rail activities. Players can choose from a variety of challenges, such as keeping to a strict-timetable and using helper engines during a winter storm.

    Some people argue that “grey gamers” simply don't have the skills required for computer games, and that teenagers are better. This couldn't be further from the truth. Most computer games require the kind of analytical thinking that improves with practice, which means that the “grey gamers” may well be far better than gamers half a century younger than them. In games where speed is the main consideration, older people would be at a disadvantage because they may have slower reaction times. On the other hand, “grey gamers” have a preference for slower paced, mind challenging games.

    Pele was born to a very poor family on October 23, 1940. His real name is Edison Arantes do Nascimento. Pele is just a nickname.

    Pele first learned the game soccer from his father. As a youngster Pele played soccer for a local club. By the time he was 16, he was playing professionally for the Santos Football Club. The club won nine national championships while he played for it.

    Pele also played for Brazil's national team in four World Cups. At his first World Cup in 1958, when he was just 17, Pele scored an amazing six goals. In the final game against Sweden, he scored two goals and Brazil won its first-ever World Cup. Pele also helped Brazil win World Cups in 1962 and 1970.

    Pele had an outstanding(突出) natural ability as a soccer player. He had great speed and balance and was able to shoot powerfully and accurately with either foot and with his head. Many European teams offered huge amounts of money to get Pele to play for their countries but Brazil declared him an official national treasure so he would stay in the country.

    In 1974, Pele retired from the Santos Club, but the next year, he came out of retirement and signed a reported $ 7-million 3-year contact(合同) to play for the New York Cosmos of the North American Soccer League. Pele said he did not this for the money. He said that he wanted to make soccer a truly popular sport in the United States. Millions of North Americans gained a new respect for the game after watching Pele play.

    The health of millions could be at risk because supplies of medicinal plants are being used up. These plants are used to make traditional medicine, including drugs to fight cancer. “The loss of medicinal plants is a quiet disaster,” says Sara Oldfield, secretary general of the NGO Botanic Gardens Conservation International.

    Most people worldwide rely on herbal (药草制的) medicines which are got mostly from wild plants. But some 15,000 of the 50,000 medicinal species are under threat of dying out, according to report from the international conservation group Plantlife. Shortages have been reported in China, India, Kenya, Nepal, Tanzania and Uganda.

    Over-harvesting does the most harm, though pollution and competition from invasive species (入侵物种) and habitat destruction all contribute. Businessmen generally harvest medicinal plants, not caring about sustainability (可持续性),” the Plantlife report says, “damage is serious partly because they have no idea about it, but it is mainly because such collection is unorganized”. Medicinal trees at risk include the Himalayan yew (紫衫) and the African cherry, which are used to treat some cancers.

    The solution, says the report's author, Alan Hamilton, is to encourage local people to protect these plants. Ten projects studied by Plantlife in India, Pakistan, China, Nepal, Uganda and Kenya showed this method can succeed. In Uganda, the project has kept a sustainable supply of low-cost cancer treatments, and in China a public-run medicinal plant project has been created for the first time.”

    “Improving health, earning an income and keeping cultural traditions are important in encouraging people to protect medicinal plants,” says Hamilton, “You have to pay attention to what people are interested in.”

Ghillean Prance, the former director of the Royal Botanic Gardens at Kew in London, agrees that medicinal plants are in need of protection. “Not nearly enough is being done,” he told New Scientist. “We are destroying the very plants that are of most use to us.”

     Many of us feel uneasy when someone stands too close to us, talks to us too loudly or makes eye contact(接触) with us for too long. But have you ever wondered why those things make you uncomfortable?
      It's all about personal peace, which means not only an imaginary space around the body, but also the space around all the senses. People feel that their space is being violated(侵犯) when they meet with an unwelcome sound, smell or look. This is probably why a man on a crowded bus shouting into his mobile phone or a woman next to you putting on strong perfume(香水) makes you feel angry.

    Whether people have had a stronger wish to protect their personal space in recent times is hard to say. Yet studies of airlines show that people have a strong desire to have space to themselves. In a survey by Trip Advisor, a travel website, people said that if they had to pay more for some extra service, they would rather have larger seats than extra food.

    Although people may need their personal space, some hardly realize it. For example, people on a bus who hold newspapers in front of their faces to read in fact keep a distance from strangers.

    Go and watch a library table. You will notice that one of the corner seats will usually be taken first, because they are the farthest way. What if someone sits opposite to you? Maybe you will pile up books as if to make a wall.

    Preference for personal space is different from culture to culture. Scientists have found that Americans generally prefer more personal space than people from other cultures. In Latin cultures, however, people are more comfortable standing close to each other.

I didn't go to Santiago,Chile to look for friendship.In fact,Chile was not even on my wish list.

A mid-life crisis woman,I got a chance to study abroad.I only wanted to learn about global business,taste South American  cuisine,and  check"study  abroad"off my  wish  list.

On the fifth day,I joined a group for a neighborhood work project aided by the anti-poverty(扶贫)organization. Our tasks were to build a water tower and paint the community center.Upon arrival,I couldn't believe my eyes.It was like a scene out of a horrible film.That moment redefined poverty for me because I had never seen such terrible living conditions.As advised,I showed no signs of the emotional battle going on inside me.

Just as I was about to start work on painting,a request came through for a few volunteers to help Nadia,a local resident who volunteered to cook for us.I raised my hand to help because I wanted to spend time with the people of the neighborhood despite my shortage of Spanish speaking skills.  Nadia had a sincere smile but not overly friendly.Even without speaking each other's language,we started to learn about one another.We chatted about our children,our upbringing,shared pictures of our family,struggled to instruct each other to communicate in the other's language,and laughed many times.

After we fed everybody and the dishes were washed,my day was over.But I found myself hesitant to leave.It was as if I had known her my entire life.I had not predicted the unselfishness of heart I would encounter,and it was moving.

As we were waiting for the car to pick us up,Nadia showed me her plants that are well-maintained.I could see that despite the hard conditions she was passionate about life.She made me long to be a stronger person.She showed me that poverty was external,but happiness was internal.I was seeking to give 100 percent for a well-intentioned cause,but I left receiving 200 percent from her.

For Adam Johnson, a potter from Brighton, the interest stirs (萌动) each spring. "It grabs a hold of me," he said. "I just get the desire to dig." Together with his shovel (铲), he is part of a larger movement. Around the world people are discovering the joys of an ancient practice: the digging of holes. TikTok videos of people digging purely for fun have been viewed millions of times. Instagram accounts devoted to the pastime have many followings.

Charlie Mone, a student at St Andrews University, was changed while digging on the beach in Gran Canaria last year. When he returned home, he founded the university's first hole-digging society. "I didn't think it would go anywhere," he said. Dozens of diggers regularly attend its events on East Sands Beach on the east coast of Scotland and the society's Facebook page has more than 300 followers.

Mone believes that that much of the appeal lies in the friendship working on a shared project in the sea air. "It's struck a chord (共鸣) with people," he said. "There's something therapeutic to just switching your brain off and digging a hole." At the end of each 1 session, the holes are filled in to prevent accidents.

Back in Brighton, Johnson, 38, is more of a lonely digger. "I have often started digging without an actual plan," he said. "Once I took out an unruly bramble (荆棘) and found some rock so I dug that out, then carried on a bit until I was in a good general digging rhythm. A few hours later my partner asked if I was coming in for dinner-the bramble had come out at breakfast and I found myself in a six-foot hole. The hole would become a sunken hot tub, but the digging would have been worthwhile anyway, he suggests. "There's something basic about it. And you find all kinds of buried treasure from people who had the garden before you. There's something magical about digging."