Younger students experience school bullying (欺凌) more frequently than older ones, and male students are bullied more than their female peers, a survey found.

    It also found that nearly half of the students had been intentionally hit or knocked down by classmates. About 6 percent said they are targeted by bullies on campus every day. The survey also found that students from ordinary schools experienced more bullying than peers from key institutions, and children from poor families are more likely to be bullied at school.

    Being bullied can have a negative impact on a child's personal development and academic performance, according to Zhou Jinyan, a researcher who led the study at Beijing Normal University. 揅hildren being bullied will find it hard to trust others,? Zhou said. 揟hey may often feel anxiety, anger, resentment or depression. These emotions will further undermine their ability to control their own life.”

    In recent years, bullying on Chinese campuses has been frequently reported and has attracted widespread attention and concern. The most recent incident to arouse heated discussions took place in December at Beijing's Zhongguancun No.2 Primary School. A fourth-grade student was bullied and laughed at by classmates, causing him acute stress disorder.

    The Supreme People's Procuratorate (最高人民检察院) received about 1,900 cases related to school bullying in 2016. Meanwhile, there was a notable increase in bullying reports involving middle school students from 14 to 18 years old.

    Zhou came up with some ways to solve the problem, including boosting communication between teachers, parents and students and trying to establish more harmonious relationships among children. She said it was strongly suggested that parents try to be involved in their children's educational experience, as their presence and companionship have proved effective in reducing bullying and its negative effects.

    Imagine you're standing in line to buy a snack at a store. You step up to the counter and the cashier scans your food. Next, you have to pay. But instead of scanning a QR Code(二维码) with your smart phone, you just hold out your hand so the cashier can scan your fingerprint. Or, a camera scans your face, your eyes or even your ear.

    Now, this type of technology might not be far away. As technology companies move away from the traditional password, biometric (生物特征识别的) security, which includes fingerprint, face and voice ID, is becoming increasingly popular.

    In 2013, Apple introduced the iPhone 5s, one of the first smart phones with a fingerprint scanner. Since then, using one's fingerprint to unlock a phone and make mobile payments has become a commonplace, bringing convenience to our lives. And since 2016, Samsung has featured eye-scanning technology in its top smart phones, while Apple's new iphone X can even scan a user's face. But despite its popularity, experts warn that biometrics might not be as secure as we imagine." Biometrics is ideally good in practice, not so much," said John Michener, a biometrics expert.

    When introducing the new iPhone's face ID feature, Phil Schiller, Apple's senior vice-president, said. "The chance that a random person in the population could look at your iPhones X and unlock it with their face is about one in a million." But it's already been done. In a video posted on a community website Reddit, two brothers showed how they were each able to unlock the same iPhone X using their own face. And they aren't even twins.

    "We may expect too much from biometrics," Anil Jain, a computer science professor at Michigan State University, told CBS News. "No security systems are perfect."

    Earlier last year, Jain found a way to trick biometric security. Using a printed copy of a thumbprint, she was able to unlock a dead person's smart phone for the police, according to a tech website Splinter. "It's good to see biometrics being used more," Jain told CBS News, "because it adds another factor for security. But using multiple security measures is the best defense."

    The search engine Google celebrated on Thursday the 110th birthday of the first Native American woman engineer. Google honored Mary Ross with a special Google Doodle on its homepage.

    Ross was born on August 9, 1908, in the state of Oklahoma. She was the great-granddaughter of John Ross, the longest—serving chief of the Cherokee Nation. Her work is considered important to the early stages of the age of space travel.

    Ross showed special abilities in math and science from an early age. As a student, she developed an interest in aviation, or the practice of flying aircraft. She went on to earn a master's degree in mathematics from Colorado State Teachers College, now called the University of Northern Colorado.

    During World War II, Ross began working for the Lockheed Aircraft Corporation as a mathematician. She earned a special certification in the field from the University of California in1949.Ross was later chosen to join Lockheed's top—secret Skunk Works team that worked on aircraft designs. The name refers to a group that is permitted to work independently on advanced projects. She was the only female engineer among the team's 40 members.

    Early on, she researched defense systems. By the late 1950s, her work centered on satellites and a series of space rockets called Agenda. The rockets were extremely important in the 1960s during the Apollo moon program.

    Ross also helped develop early design ideas for space travel between planets, including flyby space flights to study Venus and Mars. Ross retired from Lockheed in 1973.But she continued to give talks at high schools and colleges to encourage more women and Native Americans to study engineering. She died in 2008, a few months before her 100th birthday.

    Many celebrated Ross' life on social media. Twitter user Aaron Perez, for example, wrote: “Mary Ross was an engineer who pioneered in the field of satellites. I never would have known if it wasn't for the doodle. Women engineers deserve more recognition.”

    The clock always seems to be ticking rather too fast in the doctor's office and the queue of patients outside the door seems to be pressing rather too hard. Some say it's high time for the model of short, sharp one-to-one appointments to give way to shared medical appointments (SMAs).

    SMAs are doctor-patient visits in which a group of patients receive patient education and counseling (咨询),physical examination and medical support in a group setting. Typically SMAs are designed to have one or more doctors attend to a group of patients who share a common illness or medical condition. In contrast to one-to-one visits, SMAs provide a longer appointment time-frame as well as the opportunity for patients to have improved access to their physicians and meanwhile pick up additional information and support from peers.

    However, doctors who have pioneered the shared appointment approach report that there are significant challenges involved. Dr. Sumego, director of shared medical appointments, Cleveland Clinic, identifies culture change as the most significant challenge. Physicians and nurses are trained in a model of personal service and privacy; the SMA approach is a fundamental challenge to those fixed ideas. They need shared goals and a way of testing the innovation against agreed standards. Dr. Sumego says, "The physicians may be worried about the possible chaos and efficiencies that are marketed. They also have to make the patients understand what their appointment is, and what the expectation is."

    "So, if an organization was looking to start shared medical appointments, I would advise them to start the buy-in from a few champion physicians, develop the work-flow and develop some experience. Provide some support behind what that best practice should look like. Create some standards so that, as the concept spreads, you can employ that experience to start the next shared medical appointments and the next."

    All across the nation, in Americans' backyards and garages and living rooms, wild animals kept as pets live side by side with their human owners. It's believed that more exotic animals live in American homes than are cared for in American zoos. The exotic-pet business has drawn criticism from animal welfare advocates and wildlife conservationists alike, who say it's not only dangerous to bring wildlife into households but it's cruel and criminal. Yet the issue is far from black or white.

    The term exotic pet has no firm definition. It can refer to any wildlife kept in human households or simply to a pet that's more unusual than the common dog or cat. Privately owning exotic animals is currently permitted in a handful of states with no restrictions in America. Adam Roberts of Born Free USA keeps a running database of deaths and injuries caused by exotic-pet ownership: In Connecticut a 55-year-old woman's face was permanently disfigured by her friend's lifelong pet monkey; in Ohio an 80-year-old man was attacked by a 200-pound kangaroo；in Nebraska a 34-year-old man was strangled(勒) to death by his pet snake. And that list does not include the number of people who become sick from coming into contact with zoonotic(动物传染的) diseases.

    Some people see wild animals as pets as a way to connect with the natural world. Other exotic-pet owners say they are motivated by a desire to preserve threatened species. They believe climate change and human population growth could wipe out a species in record time, so having a backup population is a good idea.

    But some groups like Born Free USA and the World Wildlife Fund say that captive breeding(圈养) of endangered species by private owners—whether for commercial, conservation, or educational reasons—serves only to continue a booming market for exotic animals. That, in turn, results in a greater risk to animals still living in their natural habitat.

    I did some research and examined how British English and American English changed between the 1930s and the 2000s. Take spelling, for example towards the 1960s it looked like the UK was going in the direction of not using the "u" in "colour" and writing "centre" as "center". But since then, the British have become more confident in some of their own spellings. In the 2000s, the UK used an American spelling choice about 11% of the time while Americans use a British one about 10% of the time. There is also no need to worry too much about American words, such as "vacation", "liquor" and "lawmaker" entering British English. There are a few examples of this kind of vocabulary change but they are mostly uncommon words and are not likely to change British English too much. The British are still using "mum" rather than "mom" and "petrol" rather than "gas".

    But when we start thinking of language more in terms of style than vocabulary or spelling, a different picture appears. Some of the bigger trends (趋势) in American English are moving towards a freer use of language. American sentences are usually one word shorter in 2006 than they were in 1931.

    Americans also use a lot more apostrophes (撇号) in their writing than they used to, which has the effect of turning the two words "do not" into the single "don't". "The hand of the king" becomes the shorter "The king's hand".

    However, in all these ways Brits are changing too—and in the same way as Americans. They're just about 30 years behind the trend that Americans seem to be leading.

    So this raises a question, is British English actively following American English or is this something that is simply a natural trend in language use? Perhaps the British would have gone in that direction even if America had been discovered? I'd like to agree with the second idea but because of the fact that British people learn plenty of American language through different ways, I think the first is more correct.