A chip inserted in a young quadriplegic's (四肢麻痹患者) brain is already improving his quality of life. Soon the benefits may be more widespread.

    A 25-year-old man unable to move from the neck down recently did what many assumed impossible. After a knife attack that had left him paralyzed, all he could move was his head, which he used to push a switch and call for a nurse. And he could turn his wheelchair by blowing into a straw near his face. That was it.

    Then last June, a Foxborough (Mass.) company called Cyber Kinetics opened the man's skull and inserted a special chip no larger than a baby aspirin. That insert has given him a few additional and precious abilities. When connected to a special computer via a cable, the chip translates the young man's thoughts into commands that let him move a cursor across a PC screen and open e-mail. He can draw a circle with a computer painting program. And he can use a robotic hook(钩) to perform simple tasks like picking up a candy and sliding it across a table.

    All he has to do is to think.

    Several new studies have begun or been completed in the past year. In fact, more than half of the scientific papers in this field, called brain-to-computer interaction (BCI), have been published in the past two years, notes Jonathan Wolpaw, a research physician at Wadsworth Center, the New York State Health Dept.'s research laboratory.

    Brain surgeries (手术) are no longer rare: Thousands of Parkinson's disease patients have had special devices inserted in their brains to ease uncontrollable shaking and other symptoms. The inserts themselves have improved, so the body doesn't reject them as furiously(猛烈地). And significant development has been achieved in software used to interpret the brain's signals and change them into commands understood by computers.

    But increased demand for thought technology remains the biggest reason for the field's progress. Today, 4 million Americans live with paralysis according to the Christopher Reeve Paralysis Foundation.

    Scientists hope that thought technology will reduce the impact of such disabilities. People with spinal-cord injuries, for example, often lose their ability to walk because the communications network between their brain and their legs has been interrupted. The brain still commands the leg muscles to move, but they don't hear its orders.

    Thought technology, scientists hope, will bridge this communications gap. "Our goal is for you to see paralyzed people eating at a restaurant and for you not to know that they are paralyzed," says John Donoghue, founder and chief scientific officer at Cyber Kinetics.

    If you are interested in studying at an American university, you have to take the Test of English as a Foreign Language. The test is widely known as the TOEFL. It is the most widely used language exam for American universities.

    There are two major kinds of the TOEFL test. The first is the IBT，or Internet based Test. It is offered in most of the world and accepted by nearly every university and scholarship program in the United States. The other kind of the test is called the Paper­based Test or PBT. The PBT is less costly to take and does not require use of the Internet.

    But how to get started with TOEFL? Here are some tips.

    ⒈Plan ahead — It takes a long time to improve your TOEFL score. Do not expect a big lift in your test results after two weeks. You will have to spend a lot of time and energy.

    ⒉Master the basics first — You should have to be good at basic English before you take the test. If you score below 500 on the PBT or 70 on the IBT, study for a few months and come back to the TOEFL later.

    ⒊Get a study guide — It is easy to find study guides for the IBT. Pearson, Barron's, ETS, and Kaplan all produce quality materials, take a practice test once or twice a month. The best study guides will have explanations in the answer key.

    ⒋Use outside resources — Remember, you are learning a language, not a test. You can improve your TOEFL score by making English part of your daily life. Some simple ways are listening to English speakers, watching movies and reading newspapers. Some others are reading English textbooks, sending and reading text messages in English, and writing online in English.

    The best way to do well on the TOEFL is to know English well. The real goal of the test is to measure how well a student can communicate in English­speaking classroom.

    If you want to know more, please click here.

    After years of debate, gray wolves were reintroduced (重新引进) to Yellowstone National Park. Fourteen wolves were caught in Canada and moved to the park. By 2016, the Yellowstone wolf population had grown to more than 170.

    Gray wolves once were seen here and there in the Yellowstone area and other pans of United States, but they were gradually displaced by human development. By the 1920s, wolves had disappeared from the Yellowstone area. They went farther north into the deep forests of Canada, where there were fewer humans around. The disappearance of the wolves had many unexpected results. Deer and elk populations—major food sources(来源) for the wolf—grew rapidly. These animals ate large amounts of plants, which reduced plant diversity(多样性) in the park. With the disappearance of gray wolves, coyote (草原狼) populations also grew quickly. The coyotes killed a great number of red foxes in the park, and completely drove away the park's beavers (河狸).

    As early as 1966, biologists asked the government to consider reintroducing wolves to Yellowstone Park. They hoped that wolves would be able to control the elk and coyote problems. Many framers were against the plan because they feared that wolves would kill their farm animals or pets.

    The government spent nearly 30 years thinking lip a plan to reintroduce the wolves. The U.S. Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone. Today, the debate continues over how well the gray wolf is fitting in at Yellowstone. Elk, deer, and coyote populations are down, while beavers and red foxes have made a comeback. The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.

    Uncover a magical mix of new and unforgettable experiences when you add theme park admission.

    Item 1: An all-New Lana and Evening Show at Disney's Animal Kingdom Theme pork

    Bury yourself in the magic of nature like never before at Pandora-The World of Avatar. Visit this destination to start innovative(革新的) travel and enjoy themed dining and shopping opportunities. And at night, treat your sense to Rivers of Light – an incredible mixture of water, sound and light!

    Item 2: Dazzling New Shows at Magic Kingdom Park

    Get ready to wonder at Once Upon a Time, a new night projection show that brings Cinderella Castle to life with projections of beloved Disney scenes and characters. In addition, catch the impressive Happily Ever After ninth when it is performed for the first time on May 12, 2017.

Item 3: Attractive Escapades at Epcot

    Board an ancient Norwegian ship and go to the kingdom of Arendelle during a Frozen Ever After adventure. Then, stop by the Royal Sommerhus to meet Anna and Elsa—and maybe even start a warm hug. Longing for an air adventure? Take flight on the re-imagine Soarin' and feel as though you're flying above some of the earth's most surprising landmarks and landscapes.

Item 4: Epic Entertainment at Disney's Hollywood Studios

    Catch excellent stage shows like Beauty and the Beast—Live on Stage, have fun playing virtual games on Toy Story Mania! , and wrap up your day with Star Wars: A Galactic Spectacular, a laser and special effects show set to an iconic musical score.

    Serious Shopping, One-of-a-Kind Eateries and World-Class Acts at Disney Springs.

    Discover a waterfront destination filled with more than 150 places to shop, dine and be entertained—including brand name stores, restaurants with rooftop rooms and the only place in the world to see Cirque du Soleil^TM La Nouba.

    Traveling can be a fun way to gain life experiences, especially during Spring Break-a week-long school vacation in the United States. But what if you're a student and don't have enough money for a trip？Don't worry. Here are some useful suggestions.

    Save：This probably is the most important preparation for traveling. Cut expenses to fatten your wallet so you'll have more choices about where to go and how to get there.

    Plan ahead：Don't wait until the last minute to plan your trip. Tickets may cost more when bought on short notice. Giving yourself several months to get ready can mean security and savings.

    Do your homework：No matter where you go, research the places you will visit. Decide what to see. Travel books will provide information on the cheapest hotels and restaurants.

    Plan sensibly：Write down how much you expect to spend for food and hotels. Stick to your plan or you may not have enough money to cover everything.

    Travel in groups：Find someone who is interested in visiting the same places. By traveling with others you can share costs and experiences.

    Work as you go：Need more money to support your trip？Look for work in the places you visit.

    Go off the beaten path：Tourist sites may be expensive. You may want to rethink your trip and go to a less﹣known area. Smaller towns can have many interesting activities and sights.

    Pack necessary things：The most important things to take are not always clothes.

Remember medicine in case you get sick, and snacks in case you cannot find a cheap restaurant.

    Use the Internet：The net can help to save money. Some useful websites include www.travelcity.corn, www.bargainslowestfare.corn and www.economictravelcity.com.

    By planning sensibly, even students can enjoy the travel. Your travel experiences will be remembered for a lifetime.

    Actor Warwick Davis realized he was shorter than other people when he was eight years old.  He suddenly noticed all his schoolmates were twice his size. It was then that the effect of having dwarfism hit him for the first time.

    Now aged 48, Davis says, "I have very fond memories of school but I realized I had to become a little bit louder and funnier so I wouldn't get left out of conversations. I became quite the performer, so being short was my training in acting."

    It worked. Director George Lucas cast young Warwick as the Ewok Wicket in Return of the Jedi. The actor has gone on to star in many TV shows and films, including playing Professor Flitwick in the Harry Potter films.

    Warwick's dwarfism means he is 1.07 meters tall, while the average UK adult male height is 1.78 meters. Most types of dwarfism are caused by a genetic disorder that stops some of the body's building blocks working properly.

    Davis has a positive attitude to being "different". He says, "If I had my life all over again, I would choose the same job and be the same height. I have enjoyed every minute. At school I played rugby and football and tried long jump and high jump. I wasn't very good at them but I always had a go. I defeated everyone at chin-ups (引体向上) because I had a low body weight combined with a strong upper body from climbing up to the top cupboards to reach the biscuit boxes at home."

    Warwick is supporting Jeans for Genes Day, a charity raising public concern for millions of children born with genetic disorders in the U.K. He says, "Even if you can only give a tiny amount of money, it will make such a difference to the children."