In the latest beauty craze(狂热)sweeping social media in China，women--and even some men--are boasting that they are paper thin，by posting photographs of their waists behind a vertical(垂直)piece of A4 paper．To qualify，the waist must be entirely hidden by the paper．A piece of A4 paper is 8.3 by ll.7 inches，roughly the size of a sheet of American letter paper．

    With the A4 Waist，the trend is attracting hundreds of photographs and thousands of comments on Weibo and other social media networks like Weixin or WeChat．Being abnormally thin is a widespread standard of beauty for women，one that has been criticized as an unhealthy ideal of female attractiveness．

    The tiny waist has a long tradition in China，going back at least to King Ling of Chu，who ruled from 540 to 529 B．C．Many in China know the passage from the Book of Han，the history of the Western Han Dynasty：“The King of Chu loved a narrow waist．Many people at court starved to death．

    Several commentators have found the A4 trend disturbing．In a telephone interview，He Xiaobin，senior fashion features editor at the Chinese edition of GQ magazine，said，“I find it completely stupid．Everybody has a different frame and body shape．Using a single size to define all human beings and thinking you have created a new standard is foolish．''The A4 waist challenge annoyed him，saying that it allows certain people to gain bragging rights，while leaving others in depression．

    Luckily，some who do not qualify are turning to humor for comfort．Can they substitute a different paper size，such as A3，which is 11.7 inches across Or measure a body part besides the waist?

    The iPhone the iPad: each of Apple's products sounds cool and has become a fad(一时的风尚). Apple has cleverly taken advantage of the power of the letter “i”—and many other brands are following suit. The BBC's iPlayer—which allows Web users to watch TV programs on the Internet—used the title in 2008. A lovely bear—popular in the US and UK一that plays music and vide is called “iTeddy”. A slimmed-down version(简装本) of London's Independent newspaper was stated last week under the name “i”.

    In general, single-letter prefixes(前缀) have been popular since the 1990s, when terms such as e-mail and e-commerce first came into use.

    Most “i” products are targeted at young people and considering the major readers of Independent's “i”, it's no surprise that they've selected this fashionable name.

    But it's hard to see what's so special about the letter “i” Why not use “a”, “b”, or “c” instead? According to Tony Thorne, head of the Language Center at King's College, London, “i”works because its meaning has become ambiguous. When Apple uses “i”, no one knows whether it means Internet, information, individual or intcractive, Thorne told BBC Magazines. “Even when Apple created the iPod, it seems it didn't have one clear definition,” he says.

    “However, thanks to Apple, the term is now connected with portability.” adds Thorne.

    Clearly the letter “i” also agrees with the idea that the Western World is centered on the individual. Each person believes they have their own needs, and we love personalized products for this reason.

    Along with“Google” and “blog”, readers of BBC Magazines voted“i”as one of the top 20 words that have come to define the last decade.

    But as history shows, people grow tired of fads. From the 1900s to 1990s, products with “2000” in their names became fashionable as the year was connected with all things advanced and modern. How ever, as we entered the new century, the fashion disappeared.

    As sea levels climb, even Washington, D. C. could see more frequent and widespread flooding at high tide.

    Strong storms and high winds sometimes bring floods to coastal areas. But cities and towns along the US East Coast are flooding even in calm and sunny weather. Among them is Maryland's capital Annapolis. Tourists there must sometimes walk through water flooding downtown streets surrounding the habor. Sometimes water covers roads in Atlantic City, N. J. Even the yards and basements of coastal homes near New York City sometimes flood.

All are suffering from this trend—normal high tides surpass (超过) a rising sea level.

    Sea levels have climbed, on average, about 20 centimeters (8 inches) over the past 135 years. And a sharp increase in tide flooding is one of the more visible impacts affecting many coastal areas, notes William Sweet, an oceanographer.

    Sweet and his co-workers recently analyzed data from 45 tide gauges (计量表) along the US coasts. These tools record the changing heights of tides as they rise and fall. From these data, Sweet's team calculated the number of : “troublesome floods” in various coastal cities. These floods, Sweet explains, typically occur when water level is about 30 centimeters (1foot) above the historic level of the highest tides. In June 2014, the team reported finding a growing rise in these flooding events.

    In Charleston, S.C. from 1957 to 1963, the city experienced troublesome floods an average of 4. 6 days per year. Bur from 2007 to 2013, the occurring rate of troublesome floods jumped five times. Annapolis city was even more serious. From1957 to 1963，troublesome floods were roughly 3. 8 days per year. From 2007 to 2013, the average was 10 times higher- 39. 3days a year.

    “Over the next few decades, climate change probably drives sea levels even higher,” Sweet says. “So today's flooding problems promise to become only more widespread and frequent.”

    Anyone who has ever volunteered for any cause can tell you that in the end, they felt that they gained more from the experience than they gave. This is true for most examples of reaching out to help others. We find that we gain new understanding about not only those we help, but ourselves as well. Stressing the importance of helping others in martial arts students will benefit them both inside and outside of the class.

    Helping others strengthens families. Families that practice the belief of working together and helping each other prepare their children for the concept of teamwork outside of the home environment. By learning to help around the house through activities such as household jobs, baby-sitting and keeping a tidy bedroom, children learn valuable lessons that they carry with them to their future relationships.

    By helping others outside of the home environment, valuable friendships can be developed. When we learn to reach out to others and give off our time and talents we find that our friendships grow, which in turn is a benefit to our lives. Martial arts training supports this by exposing students to people of various backgrounds and beliefs that gather for a common goal and to help each other. Any time a group of people are working toward a common goal, team spirit surely forms. When we help each other in the martial arts setting and in every area of our lives, a friendship is formed that promotes teamwork.

    The most important thing to realize is that it does not take a lot to make a lot happen. Little things can make a big difference in the area of helping others. Simple gestures of kindness and support given frequently can build a strong base for the growth and development of each individual which leads to the success of all.

If you are looking to improve your relationship with your parents,you are not alone.{#blank#}1{#/blank#} There are a number of steps that can be taken to form a better relationship with your parents.

Be grateful.Consider all that your parents have done for you.You may find yourself feeling thankful to your parents.You will be more willing to improve the relationship.Let your parents know that you are appreciative for all they have done for you.{#blank#}2{#/blank#} For example,get them a nice gift.If you live with your parents,do some extra housework without being asked.

{#blank#}3{#/blank#} Often,people do not get along because they fail to take others' perspective.Accept that your parents are different.Think about how their lives may be different from your life,and how these different histories may be contributing to issues in the relationship.

Avoid unnecessary arguments.Sometimes arguments are unavoidable,but do your best to avoid unnecessary quarrels.This may mean that you have to bite your tongue when one of your parents says something controversial.{#blank#}4{#/blank#} If it is,make the point clearly and modestly in order to avoid an overly emotional argument.

Don't ask for their advice unless you really want it.Sometimes problems arise in relationships between parents and children,particularly at the teenage years and beyond,because parents can try to give advice that might hurt your sense of independence.{#blank#}5{#/blank#} Otherwise,you may be opening the door to frustration on your part.

A.Put yourself in their shoes.

B.Be happy with them for this.

C.Show your appreciation with your actions.

D.It can hurt to feel taken for granted,even for parents.

E.Problems between parents and children are common.

F.So try only asking for their advice when you really want it.

G.Determine whether the need to respond is really necessary.

If you've ever seen a sparrow steal your dog food or a crow open a garbage bag, you get a sense of that some birds have learned to take advantage of new feeding opportunities—a clear sign of their intelligence. Scientists have long wondered why certain species of birds are more innovative than others, and whether these capacities stem from larger brains or from a greater number of neurons（神经元）in specific areas of the brain.

It turns out that it's a bit of both, according to a recent study by an international team that included members from McGill University published in Nature Ecology and Evolution.

The researchers used a new technique to estimate the number of neurons in a specific part of the brain called the pallium in 111 bird species. The pallium in birds is equal to the human cerebral cortex（大脑皮层）, which is involved in memory, learning, reasoning, and problem-solving, among other things. When these estimates about neuron numbers in the pallium were combined with information about over 4,000 feeding innovations, the team found that the species with the higher numbers of neurons in the pallium were also likely to be the most innovative.

"The amount of time chicks spend in the nest as their brains develop might also play a crucial role in the evolution of intelligence," says McGill University Emeritus Professor Louis Lefebvre who spent more than 20 years gathering examples of feeding innovations. "Larger species of crows and parrots, which are known for their intelligence, spend longer in the nest, which allows more time for the brain to grow and accumulate pallial neurons."

The results of the study help to deal with previously opposed views of the evolution and significance of brain size and show how a life-history perspective helps to understand the evolution of cognition.