For most people, Christmas is a time to relax in the company of family and friends. But for Santa Claus, and the thousands of fake Santas who impersonate（模仿） him every year, the Christmas season is time to get to work.

    Although Santa Claus waits until Christmas Eve to take his famous sleigh (雪橇) ride, Santa impersonators can be found at shopping malls around America throughout the six weeks leading up to December 25. "When you see Santa talking with kids at your local mall, that's when you know Christmas really is on the way," says Mary Lewine of New York City.

    With the excitement of Christmas, people often forget about the real people behind the red robes （长袍) and white beards, but being a mall Santa. is a tough job. "There is more to it than just sitting in a chair. There is more to it than just a red suit," said Timothy Connaghan, who has worked as a Santa for.38 years. "Children can really put the wear and tear on you.”

    A recent survey showed some of the challenges that mall Santas face every year. About 90 percent of Santas claimed that children pulled their beards to see if they were real, and 60 percent said that up to ten kids cough or sneeze on them every day. Even more disturbing, one-third of the Santas admit to having children wet themselves while sitting on their laps.

    So why would anyone take this job? For Ben Brauch, a retired high school teacher who has worked as a Santa for the last six years, the answer is simple-the children. "I see maybe 12,000 kids in a six-week period.

    It's hard work, but it's worth it because you get to play with kids." In fact, Brauch loves his job so much that he keeps his white beard long all year.

    One May morning, 10-year-old Khadab played in the ruins of a school near his home in northern Iraq. He saw something that looked interesting. It was yellow and plastic and looked like a ball. He reached for his new toy and, BANG!

    The last thing he remembered was a big noise. When Khadab awoke, he was in hospital. His parents stood sadly by his side. They told him he had picked up an unexploded bomb. When it exploded, Khadab lost an arm.

    He was just one of hundreds of Iraqi children who have been injured or killed by stepping on and picking up explosives left over from the war.

    These landmines (地雷) and bombs have injured and killed at least 15 people a day since Saddam Hussein's government fell on April 9. And children are the most affected.

    Iraq is among the worst landmine-affected countries in the world. Many villages in the war-torn areas are surrounded by minefields (雷区). These landmines lie on the ground between rocks, up in trees and on riverbeds.

    Even though the war in Iraq is over, many children have not returned to school. They can be seen walking the streets with the natural curiosity of young kids. Their new playgrounds are places where the fighting took place. Many boys can be seen playing with unexploded bombs. A new game is to throw the bombs and run away. Some of them get away, but too many are killed. They do this for fun, and don't realize the dangers until it's too late.

    UNICEF (联合国教科文组织) has warned children, through the TV, of the dangers of landmines and unexploded bombs in Iraq. They hope to make children aware of the dangers they face.

    “I can't imagine there's going to be a classroom in the north without scared children in it. It's so widespread,” said Sean Sutton of the British-based Mines Advisory Group (MAG).

    MAG is an organization working to clear unexploded bombs and landmines in war-torn areas.

    It is difficult to report the exact number of deaths. Sutton said MAG found 320 injuries in northern Iraq in the first month after April 9. But he said the real figure was probably much higher.

    July is a month of fun-filled activities for kids and teens as long as you know where to find them. When you want some fun activities for July, consider these ideas happening in this month.

    When David Edwards founded the oPhone, he hoped scent (嗅觉的) messages would become the next big thing in the digitization of our online lives.

    The device looked like a high-tech cruet set (调味瓶), and allowed a friend with an iPhone app to send you scent messages alongside photos. Send a picture of your dinner, tag it with four different tones, and whoever is on the receiving end can sniff it from the vase-like tubes of the oPhone.

    The oPhone didn't take off, and the company has now shifted focus to a “scent speaker” called the Cyrano, which similarly uses a range of scent capsules to emit “play lists” of smells.

    Compared to our real world interactions, our online lives are lacking in scent. Our digital culture, so soaked in visual and aural stimuli, is odorless (没有气味的). So why didn't his marriage of smell and picture messaging excite more interest?

    From a technical point of view, smell is simply harder to mass communicate than sounds and pictures. “There are two main technological obstacles to making smell transmissible by digital means,” explains biophysicist and author of Perfumes: The A -Z guide, Dr Luca Turin.

    “First, there are no odor 'primaries' like RGB or CMYK. Second, it has proved impossible to stimulate the olfactory epithelium (上皮组织) directly by any means tried so far. This means that it is currently impossible to induce a sensation of smell without there being an actual chemical in the inhaled air (吸入的空气).”

    “The more we're plugged into the virtual world, the more we deeply appreciate the contrast-moments in our human, experience,” says designer and olfactory artist Mindy Yang.

    “Intuitively, we realize that we are starved of certain sensations. With the rise of digital culture, society has become more interested in the missing sense-c-what we smell.”

    This interest in scent isn't only happening within the worlds of perfume and fashion. Over the past few years a number of cultural projects have set out to focus on the power of sensory experiences, from the use of a smell map, to the Tate Sensorium, which in 2015 let users experience visual art alongside smells, tastes and sounds.

    Whether it's devices like the oPhone that try to introduce scent into digital messaging, organizations are growingly aware of our culture's desire for sensory experiences. In a time of virtual reality and scentless social networks, it's perhaps no wonder that we as a culture have such a desire for something that instinctively feels real and authentic-even if it was made in a lab.

    Charity is simple in theory：A heart warms, a hand reaches out. In practice, though, charity can become a troubled mix of motives and consequences. Giving can be driven by guilt, duty, praise, or perhaps the hope that giving will somehow make up for past cruelty or ignorance. Too little charity is far less than valuable. Too much can cause dependence which makes the receiver continuously ask for more.

    Giving from the heart is good. But critics have long worried about misdirected charity that does more harm than good. In his 2012 book, "Harmful Charity: How Churches and Charities Hurt Those They Help（And How to Solve the Problem）, "Robert Lupton, an experienced social worker of 40 years of community work in inner-city Atlanta, argues that charity must not do for the poor what they can do for themselves.

    Due to emergencies such as natural disasters, the afterward financial aid is greatly welcome. Mr. Lupton advocates it should focus on the development of self-supporting. The task can be carried out via, for instance, offering microloans, hiring local builders and suppliers, and trying to found self-supported, locally owned and operated enterprises. What seldom works, he argues, are untargeted handouts from far-off providers and the sudden arrival of inexperienced volunteer-tourists hoping to earn personal reputation by digging wells or mending roofs that locals are perfectly able to take care of themselves.

    Getting charity right isn't easy. But from money raising to the boom in volunteering among Millennials（千禧一代）, from the increasing worldwide willingness to give to the efforts by charity organizations to become more effective and fruitful, there is strong evidence that human beings' ability of taking care of others is growing along with their ability to help without harming.

    Charity can be as simple as holding the door for a stranger and as complex as a global campaign to get rid of malaria（疟疾）.Charity works best when it returns the weak to strength, when it helps a small town shaken by a heavy earthquake get back on its feet. A successful charity is one that eventually is no longer needed.

    In many aspects, nowadays business environment has changed greatly since the late 1980s. The end of the cold war completely altered the very nature of the world's politics and economics. In just a few short years, globalization has started a variety of trends with profound consequences: the opening of markets, true global competition, widespread deregulation (解除政府对……的控制) of industry, and an abundance of accessible capital. we have experienced both the benefits and risks of a truly global economy, with both wall street and main street (平民百姓) feeling the pains of economic disorder half a world away.

    At the same time, we have fully entered the information age, starting breakthroughs in information technology, which have irreversibly altered the ability to conduct business unconstrained by the traditional limitations of time or space. Today, it's almost impossible to imagine a world without intranets, e-mail, and portable computers. With amazing speed, the internet is profoundly changing the way we work, shop, do business, and communicate.

    As a consequence, we have truly entered the post-industrial economy. We are rapidly shifting from an economy based on manufacturing and commodities to one that places the greatest value on information, services, support, and distribution. That shift, in turn, attaches great importance to "knowledge workers," a new class of wealthy, educated, and mobile people who view themselves as free agents in a seller's market.

Beyond the field of information technology, the increasing pace of technological change in virtually every industry has created entirely new business, wiped out others, and produced a great demand for continuous innovation (创新).New product, process, and distribution technologies provide powerful levers for creating competitive value. More companies are learning the importance of destructive technologies—innovations that hold the potential to make a product line, or even an entire business segment, virtually outdated.

    Another major trend has been the consumer and business markets. There's a growing appreciation that superficially similar groups of customers may have very different preferences in terms of what they want to buy and how they want to buy it. Now, new technology makes it easier, faster, and cheaper to identify and serve targeted micro-markets in ways that were physically impossible or prohibitively expensive in the past. Moreover, the trend feeds on itself, a business's ability to serve sub-markets fuels customers' appetites for more and more specialized offerings.