Darek Fidyka, a 38-year-old Bulgarian, had been paralyzed (瘫痪的) from the chest down for four years after a knife attack. Scientists from Britain and Poland took cells from his nose, transplanted (移植) them into his back and re-grew his spinal cord (脊髓). Now he can walk and even drive a car. The doctors were delighted but said it was the first step in a long journey.

    The breakthrough came after 40 years of research by Professor Geoff Raisman, who found that cells had the possibility to repair damage to nasal (鼻腔的) nerves, the only part of the nervous system that constantly re-grows. “The idea was to take something from an area where the nervous system can repair itself and put it into an area that doesn't repair itself,” Professor Raisman said.

    Polish doctors injected (注射) the nasal cells into Mr Fidyka's spinal cord above the injury and used some nerves from his ankle to form a bridge across the damaged tissue. The nasal cells appear to have caused the spinal nerves to repair themselves.

    Professor Raisman achieved this with rats in the late 1990's, but this is his greatest success. “I think the moment of discovery for me was Christmas in 1997 when I first saw a rat, which couldn't control its hand, put its hand out to me. That was an exciting moment, because I realized then that my belief that the nervous system could be repaired was true.”

    Doctors chose the easiest case for their first attempt—it might not work for others. But there is a real sense of hope that an idea once thought impossible has been realized.

    David Nicholls, who helped provide money for the breakthrough, said information about the breakthrough would be made available to researchers across the globe.

    “What you've got to understand is that for three million paralyzed people in the world today, the world looks a totally brighter place than it did yesterday,” he said.

    BEIJING—Lu Na thinks that the 4,000 yuan ($630) she spent in traveling to the Republic of Korea(ROK) was worth every penny.

    “Apart from the exotic outfits and tasty kimchi, I really appreciated local people's friendliness and the convenient language environment there,” said the 27-year-old woman, who traveled to the country in October 2011 and came back with bags of fashionable dresses and cosmetics.

    “We have provided many services to Chinese visitors, including free transport cards, handbooks for individual tourists, and more liberal visa policies.”

    “We believe that no country can compare with the ROK in providing services for individual Chinese travelers,” said Zhu Linlin, media manager of the Korea Tourism Organization's Beijing branch.

    Favorable visa policies contribute to the popularity of the ROK as a destination for Chinese tourists. Only a passport and an ID card are needed for a Chinese citizen to get a visa to the ROK.

    However, some suggest that ROK hotels should provide special dining rooms for Chinese customers due to different eating habits. “ROK people often cross their legs when they have meals, but for most Chinese people, especially those who are elderly or fat, it's very hard for them to sit cross-legged without feeling numb.”

    In 1998, China granted the ROK approved destination status, which allowed Chinese citizens to travel to the country in tour groups.

    According to statistics from China Tourism Academy, the number of Chinese tourists visiting the ROK reached more than 2 million by the end of October 2011, up 19. 9 percent compared with that of the same period last year. China recently became the Republic of Korea's main source of foreign tourists in both number and spending.

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    In general, people talk about two groups of colors: warm colors and cool colors. Researchers in psychology think that there are also two groups of people: people who prefer warm colors and people who prefer cool colors.

    The warm colors are red, orange and yellow. Where there are warm colors and a lot of light, people usually want to be active. People think that red, for example, is exciting. Sociable people, those who like to be with others, like red. The cool colors are green, blue and violet. These colors, unlike warm colors, are relaxing. Where there are cool colors, people are usually quiet. People who like to spend time alone often prefer blue.

    Red may be exciting, but one researcher says that time seems to pass more slowly in a room with warm colors than in a room with cool colors. He suggests that a warm color, such as red or orange is a good color for a living room or restaurant. People who are talking or eating do not want time to pass quickly. Cool colors are better for offices or factories if the people who are working there want time to pass quickly.

    Researchers do not know why people think some colors are warm and other colors are cool. However, almost everyone agrees that red, orange, and yellow are warm and that green, blue, and violet are cool. Perhaps warm colors remind people of warm days and the cool colors remind them of cool days. Because in the north the sun is higher during summer, the hot summer sunlight appears yellow.

    It's a real case of fish out of water. Blennies (鲇鱼) in the South Pacific Ocean are gradually relocating to land to escape their predators (捕食者), in an example of evolution in action.

    Fish first began crawling onto dry land about 400 million years ago, kicking off an evolutionary chain of events that led to humans. But their reasons for exiting the sea have been uncertain.

    To look for clues, Terry Ord at the University of New South Wales in Australia has been studying several species of blennies at Rarotonga, the largest of the Cook Islands.

    At low tide, blennies are commonly found swimming in rock pools around the edges of the island. But when high tide moves in, they climb up to dry land and move around the rocks until the tide retreats.

    The researchers found that this is most likely to avoid predators that swim in with the rising tide – mainly bigger fish like lionfish.

    To test what would happen if blennies did not have an escape plan, they made blenny models and sank them in the sea. The mimics ended up with wounds, bite marks and chunks-missing.

    Of course, there are still dangers for blennies on land, like the occasional bird attack, but the predation risk on land is a third that of underwater.

    What's more, moving onto land has additional benefits for blennies. Holes in the rocks provide sheltered nests for laying eggs, and they can maintain their diet of bacteria.

    In fact, several species of blenny fish at Rarotonga have already made the full transition to land-dwelling (陆生的) species. They continue to breathe with their gills, but have developed stronger tail fins and jump from rock to rock.

    Ord believes that many evolutionary processes have been driven by the need to escape predators. “It is often assumed that animals move homes to find new sources of food, but in many cases, escaping predators is a stronger motivation.” he says.

Top Poetry Writing Tips

Tip 1: Poetry involves work, rest and play.

{#blank#}1{#/blank#}It involves hard work, especially in the early stage when you are deciding on the overall form and tone of the poem, and getting the bones of it onto the page. But writing poetry should be a playful activity, too. Have fun playing around with the language, the ideas and the music inside the poem.

Tip 2: Poetry requires both words and silence.

Poetry has been defined as "the best words in their best order". Choose your words carefully for their sounds and meaning. {#blank#}2{#/blank#} Just as the white space on the page is needed to shape the pattern of words, so the thoughts that are left unsaid, the pauses and the quiet hints, will add something extra to your poem. {#blank#}3{#/blank#}If you have created enough solid stepping stones in words and thoughts, then the reader will follow you to the end of the poem.

Tip 3: {#blank#}4{#/blank#}

Poets often turn to writing a poem when they experience a strong emotion and have the need to express it. The reading of other people's poetry can also give comfort or a sense that you are not alone in how you are feeling. But be careful not to write your poem with abstract emotions and don't tell your readers how to think or feel.

Tip 4: Writing poetry can be difficult to start and hard to let go.

It is often difficult to know how to start a poem, but the trick is to recognise the beginnings of them, in everyday life. {#blank#}5{#/blank#}They can start from remembering a funny conversation that you've overheard at the bus stop, yesterday's nightmare, a secret you've been told, or an interesting postcard that you have noticed in a shop. If you catch yourself thinking about something for more than a minute or two, that's when you reach for a pen and some paper and start jotting down(匆匆记下) thoughts, words and phrases.

A. But poetry is also about silence.

B. Writing a good poem rarely comes easily.

C. Don't be afraid of the gaps that you leave.

D. Poetry needs an emotion and a control of it.

E. Poetry sets the scene for readers to step into.

F. Poems don't have to come from exciting events.

G. You must write your feelings and views with passion.