The Queen's English is now sounding less upper-class, a scientific study of the Queen's Christmas broadcasts had found. Researchers have studied each of her messages to the Commonwealth countries since 1952 to find out the change in her pronunciation from the noble Upper Received to the Standard Received.

    Jonathan Harrington, a professor at Germany's University of Munich, wanted to discover whether accent  changes recorded over the past half century would take place within one person. “As far as I know, there just is nobody else for whom there is this sort of broadcast records,” he said.

    He said the noble way of pronouncing vowels (元音) had gradually lost ground as the noble upper-class accent over the past years. “Her accent sounds slightly less noble than it did 50 years ago. But these are very, very small and slow changes that we don't notice from year to year.”

    “We may be able to relate it to changes in the social classes,” he told The Daily Telegraph, a British newspaper. “In 1952 she would have been heard saying ‘thet men in the bleck het'. Now it would be ‘that man in the black hat'. Similarly, she would have spoken of ‘citay ' and  ‘dutay' , rather than ‘citee' and ‘dutee' and ‘hame' rather than ‘home'. In the 1950s she would have been ‘lorst', but by the 1970s ‘lost'.”

    The Queen's broadcast is a personal message to the Commonwealth countries. Each Christmas, the 10-minute broadcast is put on TV at 3 pm in Britain as many families are recovering from their traditional turkey lunch.

    The results were published in the Journal of Phonetics.

    Polar bears are one of the most popular animals for people. Polar bears are different from every other bear in the world. This is because polar bears have white fur. However, there are many facts about polar bears that people might not be aware of .

    The skin of polar bears is black, which according to thinkquest.org allows them to absorb more heat from the sun. Polar bear fur is transparent , because it is made up of hollow guard hairs. Loc.gov explains that the reason polar bears display white fur is that when the sun hits the fur ,the hollow spaces in the hair scatter the light. Since none of the light is absorbed, the light reflected back appears white to human eyes.

    Polar bears' conservation status is considered close to extinction. Global warming is considered the main cause of the decline in polar population. Polar bears use ice floats to hunt for their food. However, these ice floats are melting so polar bears are starting to drown in the search for food, and the food is becoming more difficult to get. Contrary to popular belief, polar bears do not eat penguins, because polar bears are not found in the Antarctic region of the world. Polar bears are only found around the Arctic Circle. Polar bears do not drink water. They get all the water they need from the prey they eat.

    FES. Gov specifies that polar bears are considered the largest land carnivores(食肉动物) in the world. The polar bear weight ranges between 700--1,500 pounds. Since the polar bear habitat is melting away, their main evolutionary advantages are fading. Polar bears are not able to use their camouflage(伪装) to find prey in habitats not covered with snow. Polar bears do not hibernate(冬眠). However, when the weather gets uncomfortable, or mothers give birth, polar bears will dig themselves a hidden home.

    What can we do to help save the polar bears? We can donate to organizations like the World Wildlife Fund, reduce our carbon footprint, and send letters to politicians explaining to them that we need to set up more preserves to help save the polar bear habitat.

    Dogs are wonderful companions all their own, but they can also help change your life so that you're more accepting of new friendships. A new study studied how dogs' brains responded to the human voice and found that “the human brain responds to dog emotions the same way it responds to human emotions” and that the dog's brain does the same.

    Dogs are pack animals, so in terms of pet ownership, your dog will prefer to stay with you rather than somewhere alone. Think about how this concept applies to friendship. People today are getting more and more used to spending time on social networking, email, and text. While all methods of communication are good, there is nothing like seeing your friends and hearing their voice. With good friends, sometimes a look explains everything, and you can only get this when you're together hanging out in person.

    Let's face it, dogs never hide their feeling. They let you know what they enjoy doing most, whether it is chasing a ball, going for a walk, or getting a treat. For people, it's harder to be open with your emotions. But in order to truly find a friend, you'll need to let go of your fears and put trust into your friends. The reality is that you'll never make everyone you meet happy one-hundred percent of the time, so if your friends and family think you're great, put aside the need to be liked by everyone.

    Dogs wait for you to come home and are so happy to see you again that they practically do a happy dance when you walk through the door. Friends, on the other hand, are sometimes so busy that even hearing from a friend becomes an unwelcome interruption. Rather than avoid calls or emails, make a point to talk to friends on a regular basis.

    There has long been a notion （观念） that money buys happiness. However, although "we really, really tried that for a couple of generations, it didn't work," said Francine Jay, author of The Joy of Less, A Minimalist Living Guide: How to Declutter, Organize, and Simplify Your Life.

    Thanks to a travel inspired revelation （启发）, Jay has been happily living a simpler life for 12 years. "I always packed as lightly as possible, and found it exciting to get by with just a small carry on bag," she told CNN. "I thought if it feels this great to travel lightly, how amazing would it be to live this way？ I wanted to have that same feeling of freedom in my everyday life."

Jay decided to get rid of all her excess （额外的） possessions and live with just the essentials （必需品）. "I wanted to spend my time and energy on experiences, rather than things."

    Jay is a follower of a movement called "minimalism （极简主义）". Growing numbers of people have been attracted to this lifestyle all over the world. They share the same feeling of disappointment with modern life and a desire to live more simply. Minimalists are typically progressive and concerned about the environment, Leah Watkins, a lead researcher at Ota go University in New Zealand, told Stuff magazine in March.

    But many simply experienced unhappiness caused by owning too many possessions. Depression with the materialism of our world isn't new. English romantic poet William Wordsworth summed up how dispiriting （令人消沉的） this was back in 1802, at the beginning of the industrial age, when he wrote: "Getting and spending, we lay waste our powers". His preference was to go back to nature. Closer to our own times, the hippies （嬉皮士） of the 1960s also sought to "drop out" of modern life.

    And for many minimalists, their key is to unload. Without objects, they "believe people are forced more and more into the present moment and that's where life happens," wrote Stuff.

But does simplicity ever feel like a sacrifice （牺牲）？

    "It's eliminating the excess﹣unused items, unnecessary purchases﹣from your life. Well, I may have fewer possessions, but I have more space …Minimalism is making room for what matters most," said Jay.

    And "the real questions", according to Duane Elgin, US social scientist, are "what do you care about？" and "What do you value?"

    He told CNN: "It's important for people to realize minimalism isn't simply the amount of stuff we consume. It's about our families, our work, our connection with the larger world, our spiritual dimension. It's about how we touch the whole world. It's a way of life."

    This year's flu season is pretty scary. To try to minimize the effects, public officials are still urging anyone who hasn't yet gotten their flu shot to get one as soon as possible. However, even if every single person got a shot in the arm, the vaccine(疫 苗)—with its excellent 36 percent effectiveness—would not prevent everyone from getting infected with the annoying virus. Knowledge is power, so here's what goes on in your body when you come down with the flu.

    The influenza virus primarily attacks your nose, throat, and the tubes that lead to your lungs. But the flu is so much more than that. Your muscles ache, your head hurts, and your appetite goes down, among other things. To our surprise, almost all of these symptoms have less to do with the virus itself than with your immune(免疫的)response to them. Unfortunately, the very defense you have in place to get rid of the flu is the reason you feel so painful when you recover.

    The virus usually enters through your mouth, typically by way of your hands. But it takes a few days for symptoms to set in. While this process might cause some harm to your nose and throat, it's nothing major, and nothing like the symptoms that typically accompany a bad or even mild case of the flu.

    The real fun starts when your immune system begins to fight. Your immune system comes in two parts: the innate system and the adaptive. The innate immune system is essentially an all-purpose tool. As soon as your body senses the presence of any injury or invader, the innate immune system launches into action by producing tiny proteins called cytokines and chemokines. The cytokines reproduce almost immediately and start to attack the virus. This increase in immune cells creates a serious inflammation(炎症) throughout the body. But the worst is still to come.

    Meanwhile, the chemokines work with the adaptive immune system to help create T cells. These cells are a special type of white blood cell that works in a much more specific way: They find the influenza virus, identify what's special about it, and create something unique on their surface that finds and destroys similar invaders.

    Millions of Americans sit behind a computer screen, chained to their desk all day because the vast majority of stable, high-paying professions(职业) are "office jobs". However, having a successful career does not require you to sit behind a desk and plug away at a computer all day.

    In fact, there are a large number of non-desk jobs in a variety of industries that are growing and offering workers a direct path to the middle class, according to a new analysis of labor market information from CareerBuilder. While most of the highest-paying non-desk jobs are medical professions that require a doctoral or professional degree, there are 170 non-desk professions that pay $15 per hour or more, do not require a bachelor's degree(学士学位) for a typical entry-level position, and have seen at least 6 percent job growth over the last four years.

    "The US workforce has gradually changed to office-based work because of the rise of the professional service economy and productivity gains associated with information technology," Rosemary Haefner, Vice President of Human Resources Officer at CareerBuilder, said in a statement. "But some of the healthiest areas of job growth year after year are in middle-skill professions that don't require workers to sit in front of computer monitors and phones for 40 hours a weel."

    Here are the top-paying jobs that don't require you to work at a desk in various kinds — none of which require a four-year college degree — and their hourly salary(工资) and growth rate since 2010: professional assistants(助理) : $26.57, 14 percent; elevator repairers: $37.81, 6 percent; mechanical engineering technicians: $25.19, 10 percent; and electromechanical(电动机械的) technicians: $24.68, 8 percent.

    While they tend to pay less than traditional office jobs, non-desk professions provide a variety of benefits. Haefner points to a 2014 CareerBuilder survey that discovered workers who don't work at a desk all day are less likely to complain about their work environment and less likely to report being overweight.