A machine that takes sweat-laden (浸满汗水的) clothes and turns the sweat into drinking water is in use in Sweden. The machine makes the clothes turn round quickly, heats them to remove the sweat, and then passes the steam through a kind of special material to make purified water.

    Since it has been brought into use, its creators say more than 1000 people have drunk others' “sweat” in Gothenburg. They add the liquid is cleaner than local tap water.

    The device was built for the United Nations' child-focused charity UNICEF to promote a campaign highlighting the fact that 780 million people in the world lack access to clean water.

    The machine was designed and built by the engineer Andreas Hammar, known locally for his appearances on TV tech show “Mekatronik”. He said the key part of the sweat machine was a new water purification part developed by a company named HVR.

    “It uses a technique called membrane distillation (膜蒸馏),” he told the BBC. “We use a special kind of material that only lets steam through but keeps bacteria, salts, clothing fibers and other things out. They have something similar to the International Space Station, but our machine is cheaper to build. The amount of water it produces depends on how sweaty the person is, but one person's T-shirt typically produces 10ml, about a mouthful.”

    The device has been put on show at the Gothia Cup-the world's largest international youth football tournament. Mattias Ronge, chief executive of Stockholm-based advertising agency Deportivo, said the machine had helped raise awareness for UNICEF, but in reality had its limitations.

    “People haven't produced as much sweat as we hoped – right now the weather in Gothenburg is lousy,” Mattias Ronge said. “So we've equipped the machine with exercise bikes and volunteers are cycling like crazy. Even so, the demand for sweat is greater than the supply. And the machine will never be produced in large numbers, since there are better solutions out there such as water purifying pills.”

    Once there was an old man, who was completely broke (破产的), living in a tiny house. He had to live on a $105-a-month social security (保障) check.

    At 65 years of age, he decided things had to change. So he thought about what he had to offer. His friends thought highly of his chicken recipe (烹饪法). He decided that this was his best shot at making a change.

    He left Kentucky and traveled to different states to try to sell his recipe. He told restaurant owners that he had a mouth-watering chicken recipe. He offered the recipe to them for free, just asking for a small percentage (比例) on the items sold. Sounds like a good deal, right?

    Unfortunately, not to most of the restaurants. He heard "NO" over 1, 000 times, but he didn't give up. He believed his chicken recipe was something special. He got rejected (拒绝) 1,009 times before he heard his first yes.

    With that one success, the old man changed the way Americans eat chicken. Kentucky Fried Chicken, popularly known as KFC, was born. The old man was Colonel Harland Sanders, who was an American businessman, best known for founding fast food chicken restaurant chain Kentucky Fried Chicken. His name and image (肖像) are still symbols of KFC now.

    Africa is a very diverse land with many different tribes. One tradition that many of these groups share is painting or marking their bodies and faces in color. They do this for many reasons. Some marks are used to identify people as part of the group. Other marks are used for ceremonies such as wedding and during times of war. Let's look at some different examples of body painting.

    Red is a common color in body painting because it often represents health and long life. Among the Masai of East Africa, when men are old enough to marry and make decisions for their people, they participate in a special ceremony in which they paint their heads and faces red. This ceremony takes place every seven to fourteen years, so there is not an exact age for participating in it.

    The Samburu, also from East Africa, like to paint their faces and hair red because they think it looks pretty.

    The Masai men also have a unique way of showing that they are brave. To show that he has killed a lion, a man will paint his body with a natural white material, making special marks to represent this accomplishment. The Masai men also use this white to show that they are no longer boys and are considered adults.

    One quite unusual example of face painting is done by the Wodaabe people of West Africa. Once a year, they have a beauty contest for men. The men paint their faces yellow and red. Then they add white and black circles and lines. Black paint is used near the eyes and on the lips to draw attention to the whiteness of their eyes and teeth, which the Wodaabe consider most beautiful. The women then decide which man they like best.

    As you travel, enjoy the beautiful and bright colors of Africa.

    I'm a reporter. Last month I was in Stockholm, Sweden. Now I'm in Frankfurt, Germany. Next month, who knows?

    You certainly won't believe that I can call you from my laptop, which is what I'm often doing these days using something called Skype.

    Skype lets me call any phone number anywhere in the world for about 2 cents a minute, a little more to some places, such as the Middle East and Asia. My computer does the dialing, and the processing of incoming and outgoing voices. All you need is a broadband connection (宽带接头). With the basic version of Skype, all anyone needs to make or receive a call is to install the program on his or her computer (and that includes personal digital assistants). All calls from PC to PC are free.

    You don't even need a pair of headphones, though headphones can be a good idea if you wish to be discreet. I use my laptop's built-in microphone.

    The paid service for calling regular telephones is called SkypeOut. The quality is completely clear, provided that there's not too much traffic on the Internet. If there's an echo, hang up and try again, and it usually gets better. There is one warning: on some computers, especially those running older versions of Windows, it doesn't always work, or can sound like a confusing conversation. You can't hear a thing.

    Skype was invented chiefly by a Swede named Niklas Zennstrom along with a group of programmers in Estonia.

    A study showed that the experiences children have in their first few years are important. These experiences affect the development of the brain. When children receive more attention, they often have higher IQs. Babies receive information when they see, hear and feel things, which makes connections between different parts of the brain. There are a hundred trillion(万亿)connections in the brain of a three-year-old child.

    Researcher Judit Gervain tested how good newborns are at distinguishing different sound patterns. Her researchers produced images of the brains of babies as they heard different sound patterns. For example, one order was mu-ba-ba. This is the pattern"A-B-B". Another order was mu-ba-ge. This is the pattern “A-B-C”. The images showed that the part of the brain responsible for speech was more active during the" A-B-B" pattern. This shows that babies can tell the difference between different patterns. They also were sensitive to where it occurred in the order.

    Gervain is excited by these findings because the order of sounds is the building block of words and grammar." Position is key to language," she says. "If something is at the beginning or at the end, it makes a big difference: John caught the bear.' is very different from 'The bear caught John.'”

    Researchers led by scientist Patricia Kuhl have found that language delivered by televisions, audio books, the Internet, or smartphones－no matter how educational－doesn't appear to be enough for children's brain development. They carried out a study of nine-month-old American babies. They expected the first group who'd watched videos in Chinese to show the same kind of learning as the second group who were brought face-to-face with the same sounds. Instead they found a huge difference. The babies in the second group were able to distinguish between similar Chinese sounds as well as native listeners. But the other babies－regardless of whether they had watched the video or listened to the audio－learned nothing.

    Scientists have found evidence of a link between social and economic status and childhood attention deficit disorder(ADHD)(注意力缺陷多动障碍)in the UK. A team led by the University of Exeter Medical School analysed data from the Millennium Cohort Study, a database of more than 19, 500 UK children born between 2000 and 2002 .The study was published in the Journal of Child Psychology and Psychiatry.

    Findings showed that more children with ADHD came from families below the poverty line than the UK population as a whole, with average family incomes for households whose study child was affected by ADHD at £324 per week, compared to £391 for those whose child was not. The study found the odds (机会)of parents in social housing having a child with ADHD was roughly three times greater than for those who owned their own homes.

    The team also found that the odds of younger mothers having a child with ADHD were significantly higher than for other mothers. Mothers with no qualifications were more than twice as likely to have a child with ADHD than those with degrees, and lone (孤独的)parents were more likely to have a child with ADHD diagnosis than households with two live-in parents.

    Information was gathered from surveys when the cohort children were nine months old, and at the ages of three, five, seven and eleven.

    Dr Ginny, of the University of Exeter Medical School, who led the study, said, "There is a genetic element to ADHD, but this study provides strong evidence that ADHD is also associated with a disadvantaged social and economic background. Some people believe that ADHD in children causes disadvantage to the economic situation of their family, but we found no evidence to support that theory. It's important to discover more about the causes of this disorder so that we can look towards prevention, and so that we can target treatment and support effectively. "