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    For many people of Norway(挪威), skiing(滑雪) is the best way to have fun in winter. Almost everyone can ski. Children learn to ski after they learn to walk. Long, long ago in Norway, there were no buses, trains or cars. People had to find a way to walk over the deep snow. Skis were the right answer!

    Although they love winter, the people of Norway are also happy to see summer come. They enjoy the out-door activities at any time of the year. In summer they swim and sunbathe near the beach. Some people go hiking and go mountain climbing. Sail-boating is also very popular during the warm sunny summer months.

    The Norwegians(挪威人), like people everywhere, find many in-door ways to have a good time. During the long winter they also enjoy movies. They like to read books from the libraries in all seasons. Family life is very important to the people of Norway.

    3D printing is becoming more and more popular. We are now able to print things such as clothing, prosthetic limbs (假肢), musical instruments(乐器) and so on. People and businesses are able to create the things they need very quickly and easily using 3D printers.

    But can you imagine printing food? Some scientists are trying to revolutionize our eating experience by doing this. They hope that having a 3D printer in the kitchen will become as usual as the microwave or blender. Scientists say that they are easy to use: you simply have to choose a recipe and put the food "inks" into the printer. You can also change the instructions to make the food exactly how you want it. This means that it would be very quick and easy to create delicious meals.

    Using 3D printers to create your meals would also be saving the environment. There would be less need for traditional growing, transporting(运输) and packaging as food production would be quicker and easier.

    Printing food could also help people who suffer from dysphasia (吞咽障碍症). They could program (为…编程) the printer to print softer versions of their favorite foods so that they would not have trouble eating them.

    However, some people think that the future of 3D-printed food would be a disaster. It could take away many jobs, including those for growing, transporting and packaging food. Imagine a world where there was no need for farming or growing crops and the same tastes could be printed from a raw "food ink". Similarly, traditional cafes and restaurants might lose business. Also, there are worries about the printed food: is it really possible to get the nutrients (营养物) we need from food-based inks and gels?

    What's more, cooking and eating together with family and friends has long been a traditional and enjoyable activity. It is hard to imagine a world where the fun of cooking is dead and meals can be done at the touch of a button.                                                        

    Have you ever imagined going to other countries without your paper Passport? That will soon come true. And your paper passport will become history. You may use their new kind of passport

    It's reported that Australia will be the first country to use the cloud passport. With the cloud passport, you don't have to take a paper passport with you all the time. The cloud passport will have your name, photos and other information. And if you go to other countries, you can just check the information on the computer.

    When you take a paper passport with you, you might lose it. But with the cloud passport, you don't have to worry about that.

    Do you think the cloud passport is a great idea? Perhaps you will have it in the future, too.

    Fresh green grass, Hundreds of colorful wild flowers. Water running into little pools. Birds making their homes in boxes. The 9, 500-square-metre Augustenborg Botanical Garden may look just like any other well-organized park but there's a difference. It lies on the roofs (屋顶) of industrial and office buildings in the city of Malmo in Sweden.

    Green roofs are not a new invention. And now they are getting popular again. The common roofs of a modern city have endless black surfaces with no life or water. Perhaps that's why a garden on a roof becomes such a perfect choice for more and more people.

    Green roofs are not just pretty. They also help to moderate the city temperature. The high temperatures on common roofs in the summer can make top floor flats uncomfortably hot. What is more, they play a part in making the cities hotter than the countryside around them, causing the "urban heat-island effect". On a green roof, however, with its plants and water, temperatures change only a little, as they do in a park. This can greatly cut the costs of heating and cooling in the building below.

    Also, a green roof takes in rain water, and protects the city drainage (排水) system.   ▲    And small animals and birds can make their homes on it. Thanks to this, the city may become part of nature, rather than something completely separate from it.

    While the cost of building such a roof can still be higher, it can be cheaper in the long term as a result of energy savings. And wouldn't it be wonderful to be able to walk out into a garden high above the city's noise and traffic, whether you're at school or in an office or just at home in a ten-floor block?

    Have you seen Avatar(《阿凡达》)? It's a popular3Dflm, and you may have to wear 3D glasses to see it. The 3D glasses make the images(图像) from the film look as if they are coming straight towards you.

    More and more 3D films are coming to theatres. Some say that 3D TV sets will come into our homes in the near future. 3D technology can make TV and films more exciting. However, people with eye problems may get headaches if they spend too much time watching 3D films. Why?

    When we look at an object(物体), each eye sees it at a different angle. Our eyes send the two images to our brain(大脑), and the brain puts them together. 3D technology uses two film projectors(投影机). One projects a left—eye image and the other projects a right—eye image. 3D glasses allow us to see a different image in each eye. So, when we are watching a 3D film, our brain can't put together the images. The brain needs to work harder at reading "the images. That makes it easier for people with eye problems to get dizzy(头晕的) or have headaches. A famous eye doctor said if your eyes can't focus(聚焦)on the same object at once, you will have trouble watching 3D films.