In some countries，open campus (校园) is widely accepted. For example, French students have a two-hour lunch break from 11:30 a.m. to 1:30 p.m. During their lunch break, they can eat at home or at a restaurant. But students in the Philippines have a tougher schedule. They have only two 15-minute breaks and an hour for lunch.

    What Schedule would be best for American schools?

    Having breaks between classes is great, but having breaks off campus is even better. There are several advantages to open campus, including simple conveniences such as being able to eat different meals during lunchtime, rather than having the cafeteria (自助食堂) dishes, as well as having the chance to take a break at home.

    However, there are more reasons I disagree with allowing high school students the right to have an open campus. Sure, it's great being able to escape school during the day for a while, but soon enough that may easily become the rest of the day.

    If open campus is allowed, it is very possible that such freedom will make it all too easy for students to skip their afternoon classes. Of course, there will be students responsible enough to come back to school.

    But unexpected problems such as heavy traffic, city bus delays (延迟) or cars breaking down may prevent them from returning to school. It benefits the students to stay in school during lunch hours to avoid transportation issues.

    Depending on how close the school is to restaurants and students' homes, open campus could be a great idea. Unfortunately, though, most public schools in America are not located close enough to restaurants or students' homes, thus causing the negative results to outweigh (超过) the positives in the end.

    Would you like to travel? Here is some advice for you.

    Kingsway Hall Hotel

    We offer quality service(优质服务)in Kingsway Hall Hotel. This location puts guests in easy reach of many places, such as the British Museum and Piccadilly Circus. Our hotel also has modern Western food, and offers a perfect dining environment. The lounge bar is a comfortable place to enjoy a drink while watching the tourists. There are hundreds of dining choices within walking distance. Non-smoking rooms are ready for guests.

    Hilton Docklands Riverside

    Located on the bank of the Thames, our hotel is about two miles east of Tower Bridge and 36 miles from London Heathrow Airport. Our hotel has a beauty salon, a flower shop and a swimming pool. The hotel also offers laundry(洗衣店)services, babysitting, shining shoes, and local area transportation.

    Windermere Hotel

    Located in the center of London, our hotel puts guests within easy reach of London's well-known buildings. Buckingham Palace and the Royal Parks are just a short walk away. Within 1. 5 miles you can visit Westminster Abbey and the Houses of Parliament. The theatres, Harrods shopping centre, and the designer shops of Sloane Square and Knightsbridge are all only a short walk away or a taxi ride away.

    Here's an idea whose time has come: A flu shot that doesn't require an actual shot.

    For the first time, researchers have tested a flu vaccine patch(疫苗贴) in a human clinical trial and found that it delivered as much protection as a traditional injection(注射) with a needle. Doctors and public health experts have high hopes that it will increase the number of people who get immunized(免疫的) against the flu.

    Seasonal flu is responsible for up to half a million deaths around the world each year according to the World Health Organization. A team led by Georgia Tech engineer Mark Prausnitz has come up with an alternative method that uses "microneedles". These tiny needles are so small that 100 of them, arranged in order on a patch, can fit under your finger. Yet they're big enough to hold vaccine for three types of flu.

    None of the study volunteers had serious side effects. The groups that got patches had mild skin reactions that were not seen in the regular needle group, while the volunteers in the regular needle group were more likely to experience pain. Overall, 70 percent of the volunteers who got vaccine patches said they'd rather use them again than get a traditional flu shot. The study authors declared it a success on all fronts.

    The biggest beneficiaries could be people in low and middle-income countries, where flu vaccines are hard to come by. Reducing pain is nice, but other benefits—the patch costs less, is easier to transport, doesn't require refrigeration, can be self-administered and doesn't cause waste of needles—are even better.

    "Microneedle Patches have the potential to become ideal candidates for vaccination programs," wrote Katja Hoschler and Maria Zambon of Public Health England.

    LEGO(乐高) recently announced that they will start producing pieces from sustainable (可持续的) sugar cane. The toys, which will be closely similar to classic ones, will also feature "botanical elements" like leaves, bushes, and trees.

    The pieces will be included in LEGO'S box sets from this year onwards. The move is part of the Danish company's campaign to use sustainable materials in its products by 2030.

    However, Tim Brooks, the firm's vice-president, said, "We want to make a positive influence on the world around us, and are working hard to make great play products for children using sustainable materials. This is a great first step in our goal to make all LEGO pieces using sustainable materials."

    The new line of production has reportedly already started with pieces being produced from polyethylene, which is a soft and durable plastic (耐用的塑料). LEGO says that we needn't worry about the quality of the new products, as they've tested the plant-based plastic to ensure that it meets the high standards for quality and safety that consumers (消费者) expect from the company.

    "LEGO products have always been about providing high quality play experiences and giving every child the chance to shape their own world through inventive play. Children and parents will not notice any difference in the quality or appearance of the new pieces, because plant-based polyethylene has the same qualities as traditional polyethylene," said Tim Brooks.

    "It is important that companies in each industry find ways to help ensure a future where people, nature, and the economy grow healthily," said Alix Grabowski, an officer at WWF. "The LEGO Group's decision to use sustainable plastics represents a great opportunity to reduce dependence on finite (有限的) resources, and their work with the Bioplastic Feedstock Alliance will allow them to connect with other companies to continue to think creatively about sustainability."

    Why are people interested in eating raw foods or whole foods? One reason is that eating these types of food reduces the risk of acid accumulation in your body.

    Raw and whole foods are usually digested more efficiently than cooked and refined foods. When we cook foods, we destroy the natural enzymes (酶) that are part of the food in its raw form. These enzymes were intended by nature to help us digest the food. When we consume food without these natural enzymes, our bodies either digest the food improperly or allow too many nutrients to be absorbed into the bloodstream. In both instances, the result is obesity. When too many nutrients are absorbed at once, the body grows fat. Improperly digested food moves slowly through the digestive tract, where it becomes increasingly acidic. To protect its vital organs from this acidic waste, the body changes the acid into fat and stores it safely away from the organs.

    Processed foods contain chemical elements, which might confuse the appetite mechanism that tells us when we've had enough to eat; as a result, people often overeat. Processed foods also upset the digestive cycle. The body will either identify these foods as allergens and then store them safely away from the organs as fat, or the remains of undigested food will become acidic and enter the bloodstream as acid waste, which will stick to the blood vessel walls and block the passage of vital oxygen and nutrients heading for the body's cells. The body's metabolism (新陈代谢) becomes inactive, and the result is weight gain and obesity.

    The accumulation of acid in the digestive tract makes digestion increasingly inefficient. When that happens, even healthy foods can become acidic and the food allergies will become more common.

    To stop this vicious circle in its tracks, people need to consume food and supplements that will neutralize the acid already accumulated in body. Eating the right types of raw and whole foods can help. It's also important to restore your enzyme balance. You need to identify and avoid the foods that cause acid accumulation and consume the foods that increase enzyme production. If you truly want to change and help your body heal itself, you need to take an active approach.

    Did you know that if you attach a weighed stick to the back of a chicken, it walks like a dinosaur?

    No, you did not know(or care to know) such things, but now you do! Thanks to this year's winners of the 12 Noel Prize! Now in is 251h year, the lg Nobel is the goofy younger cousin of the honored Nobel Prize. It applauds achievements in the fields of medicine, biology, physics, economies.literature.etc. Every September at Harvard University, awards are presented in 10 categories that change year to year, depending on - according to the organization - what makes the judges "laugh, then think".

    The ceremony officially begins when audience members launch paper airplanes at an assigned human target on the stage, then speakers only have 60 seconds to present their research. In previous year, the one-minute rule was imposed by a young girl - nicknamed Miss Sweetie Poo -who would go up to the platform and repeat the words: "Please stop, I'm bored." in a sharp tone until the speaker left the stage.

    Fortunately for candidates though, the Ig Informal Lectures are held afterwards on Saturday to give presenters more time to explain the crazy things they're working on.

    The research can seem more like the brainchildren of teenage boys than of respectable adults. Justin Schmidt won the physiology Ig for creating the "Sting(蛰) Pain Index," which rates the pain people fell after getting stung by insects. Smith pressed bees against 25 different parts of his body until they stung him. Five stings a day for 38 days, Smith concluded that the most painful sting locations were the nose and the upper lip. Ouch.

    As silly as they sound, not all of the Ig awards lack scientific applicability, A group of scientists from 12 different counties won in the medicine category for accurately diagnosing patients with appendicitis (阑尾炎) based on an unusual measurement: speed bumps(减速带) . They found that patients are more likely to have appendicitis if they report pain during bumpy car rides.

    All these weird experiments have just one thing in common. They're improbable. It can be tempting to assume that "improbable" implies more than that--implies bad or good, worthless or valuable, trivial or important. Something improbable can be any of those, or none of them, or all of them, in different ways. And what you don't expect can be a powerful force for not only entertaining science, but also for the boundary-pushing science we call innovation.