Wild weather, unexpected coral reefs and dangerous sea creatures… these are the nightmares (噩梦) you can imagine a teenager on a solo voyage (独自旅行) around the world might suffer from. But for Laura Dekker, sailing around the globe seems less a price to be paidthan a prize to be treasured.

    As the 19-year-old Dutch sailor said in Maidentrip, a documentary（纪录影片） released last year about her experience of becoming the youngest person to sail around the world alone in 2012, “I was born on a boat. I lived my first five years at sea. And ever since, all I have wanted is to return to that life.”

    With her yacht(游艇) Guppy, Dekker began her journey at 14 and sailed 50,004 kilometers in 519 days.

    The flying fish keeping her company, the dolphins following in her wake and the warm days spent on deck playing the flute (长笛) as she watched another unforgettable sunset were enough to make others jealous.

    But these didn't always go well. There were terrible moments in which Dekker feared death. On one occasion, a whale almost turned Guppy over. Another time, she battled extreme winds and Guppy surfed down 8-meter-high waves.

    Out on the open sea alone, she also got used to living without a fridge, a flushing（用水冲洗） toilet, and a hot shower.

   “As a human being you don't need much,”she told Stuff.co.nz. “ They might make life more comfortable, but you really don't need them to be happy.”

    In fact, her outlook on life was shaped by the trip. “I wanted the storms. I wanted the calms. I wanted to feel loneliness,”she told The New York Times. “And now I know all these things. It's the end ofthe dream I had as a child, and it's the beginning of my life as a sailor.”

    Researchers at Brigham found about one in five teenagers now have some degree of hearing damage. The researchers did not say why hearing loss has risen, but other experts have strong suspicions. One likely culprit, they say, is MP3 players.

    An MP3 player can be dangerous to hearing when its decibel level is turned up too high. High-decibel sounds can damage nerve endings, called hair cells. If a sound is loud enough, the damage can be permanent. A loud sound can shake the membrane (薄膜) on which the hair cells sit- “like an earthquake”. That shake can break or even uproot hair cells. When that happens, the hair cells are finished. Human ears cannot regrow hair cells. Therefore, when listening to an MP3 player, set a volume limit and avoid exposure to loud sounds.

    On the other hand, the loudness of today's music may not be totally under your control. Music companies have been purposely turning up the volume. It's a trend called the fight for loudness.

    Play a CD from the 1990s. Then play a newly released tune. Don't touch the volume control. You'll probably notice that the new CD sounds louder than the old one. Why? Sound engineers who create CDs are using dynamic range compression (压缩), a technology that makes the quiet parts of a song louder and the loud parts quieter. The overall effect of compression is a louder recording.

    Many musicians and sound engineers aren't pleased. They say that compression is driving down the quality of today, s music, making it sound flat and blaring. Gray Hobish, a sound engineer, explains that music should be a combination of loudness and softness. But music companies want to make music louder so it will stand out. That's important in the competition among recording companies.

    What about listeners? Many teenagers listen to music on the go in noisy places and through headphones, all of which reduce sound quality. So young listeners may not notice the poorer quality of modem recordings. “To their ears,” says Hobish, “the music sounds fine. And they are not aware of the hidden threat of the music they are enjoying.”

    Qibao Ancient Village

    Qibao, located in the center of Minhang District, Shanghai, is a village with a history of one thousand years. In the village, wine and tea are served on old-fashioned square tables together with long benches, long-mouth copper pots and flat-end chopstick used. The most famous snacks in old Shanghai are square pastry, rice wine and steamed salted pork in wine.

    Telephone: 021-21087225

    Entrance Ticket: 45 yuan per all-in-one ticket (preferable price of 30 yuan is available now), covering almost all tourist attractions inside the village.

Jinshan Village of Farmer Painting

    Villagers skillfully make good use of folk arts such as printing and dyeing, embroidery (刺绣), wood carving. They take the various folk customs and the busy scenes of labor of villagers in the lower Changjiang valley as the theme of paintings and create farmer paintings in a simple style.

    Telephone: 021-57355555

    Entrance Ticket: 30 yuan/person

    Merry Countryside Tour in Zhonghua Village

    The village provides tourists with accommodations, tours, chess, cards, fitness and entertainment through renting out separate farmhouse and sells tourist products and agricultural by-products related to the merry countryside tour.

    Telephone: 021-57395433

    Entrance Ticket: Free

    Pudong Lingkong Agric Gardening

    It is one of Shanghai countryside tour scenic spots, which features art of teapots, crop plantation and export. The Geological Science Popularization Hall stores up tens of thousands of rare stones collected all over the world.

    Telephone: 021-33935557

    Entrance Ticket: 50 yuan/person

    Sunstroke (中暑) is a condition that can quickly go from dangerous to deadly, especially if proper care isn't given immediately.

    Sunstroke, sometimes called heatstroke, is a result of the body temperature rising above safe limits. This causes the body's necessary functions to stop working.

    It's usually pretty easy to avoid sunstroke, as long as proper action is taken. In that case, you need to act as quickly as possible to return that person's body to a safe temperature. Here are a few tips to help treat sunstroke.

Call for help

    Call to get an ambulance as quickly as possible. This should be the first thing you do, especially if the sunstroke person has fainted(昏倒). Also, call for help from anyone nearby if you're in a public place. If there's no one around, call someone nearby if they can get there sooner than an ambulance. Ask everyone to bring you as much water as possible, if there isn't much nearby.

Get the person to a cooler area

    If there's a building nearby, aim for that. Anywhere with plenty of air conditionings and water is perfect. If a building isn't available, bring the person to a well shaded area.

Get the water flowing

    If the person is still conscious, get him or her to drink water. If there's a bathtub available，fill it with cool water and put the person in it.

If your water supply is limited, you have to save it. Dampen a towel or shirt and put it on the person's body. Focus on the face, neck，and chest.

Fan the person

    Getting moving air over the person cools him or her down. Use anything, a towel or sheet, a shirt your hands，or a piece of board. This is where having many people around really helps, as they can combine to fan the entire body.

    As a Fulbright（富布莱特法案基金）scholar at Yale, I wanted very much to get some individual help from some famous professors, but their office-hours were only once a week and there were always students waiting outside. At first, I was too polite to get their help. Then I realized that Chinese politeness does not work in this society. I needed to be aggressive to get what I wanted. I also noticed that Chinese students or Asian students were very polite in class while American students often interrupted the professor, asking questions and dominating the discussion. The Chinese students were not as aggressive as American students.

    I was impressed by the role of the professor in the class. The professor didn't act as an authority, giving final conclusions, but as a researcher looking for answers to questions together with the students. One linguistic feature of his interacting with his students was that he used many modal verbs-far more than I did in Beiwai. When answering questions, he usually said: “this is my personal opinion and it could be wrong. It would be a good idea if you could read the book I mentioned the other day.” Or,“ You may find the book I recommended helpful.” Or,“You could be right, but you might find this point of view also interesting.” When making comments on students' performances, the professor usually said:” It might have been much clearer if you had taken in some of the ideas we discussed earlier this semester.”

    In China, authorities are always supposed to give wise decisions and correct directions. Therefore students always expect the professor to give an answer to the question. I still remember how annoyed they were when foreign teachers did not provide such an answer. Their expectations from authorities are much higher than those of American students. Once the Chinese students got the answer, they were sure about it. That is why they make far more certain statement than American students. That is why Chinese students find it difficult to use modal verbs because the function of modal verbs is to provide room for negotiation and different ideas.

    Most of us will be familiar with the traditional talent show set-up: thousands of hopefuls line up outside the audition（试音）room, wait for hours to go in and perform for a group of judges. Then these potential pop stars could be lucky and get through to the next round, or they might hear the command, "Sorry, it's a no from me. But what do the judges actually bring to a talent show?

    Music talent show judges attract millions of viewers each week to their programs. As public figures, they play an important part in advertising campaigns for these programs. They often receive high salaries and can be moody. Are they really worth the expenses and difficulties that they cause? One solution might be to replace them with computers.

    Can computers really match human judges? Scientist Dr Nick Collins and his team at the University of Sussex think they can. Dr Collins has been working on a project that involves programming three computerized judges that he says would be far more consistent in their judgment of musical performances. Employing a special programming language, Dr Collins's digital judges can be trained up by "listening" to particular musical styles. After they have been listening for a while, the programming language allows these judges to spot the specific features of the music, including the voice quality, the rhythm etc. Collins says, “The judges' listening capacity is not yet as good as a human ear, but they won't be as moody as some human reality TV show judges.”

    Maybe that is the problem with this electronic musical innovation. Real human judges on talent shows interest us with their personality, decisions and catchy phrases. Will a computer program be able to do the same?