In Asia, there are special competitions where kites have complex designs and are fitted with instruments that make musical sounds as the wind blows through them. Although all kites have a similar structure （结构）, they are widely different in size and shape. Kite-fighting competitions are also held, in which competitions us their kites to attack and bring down their opponents'（对手）kites or cut their strings（线）.

    For more than 15 years, the Big Wind Kite Factory has been giving kite-making and kite flying classes for the children on an island in Hawaii. In its kite-making lessons, students can make kites in as little as 20 minutes! Children as young as four years old can learn how to fly a kite. Jonathan Socher and his wife Daphne started the kite factory in 1980. Their kites are made of nylon（尼龙）.Their designs are Hawaiian themes created by Daphne. The designs are cut out of the nylon with a hot knife that seals the edges and then fastened directly onto the kite. 

    The kite that is used to give lessons is a regular diamond kite with a rainbow pattern. The difference between this kite and the ones they make during the lessons is that it is a two-string controllable kite. Big Wind employees fly the kite and for a few minutes show students how pulling on one line and then on the other controls the direction the kite goes in. Then the controls are given to the students.

    Jonathan insists that it is not necessary to make a huge impressive kite to have fun making and flying kites. Even the simplest structure can work, and can give hours of fun. Go on, give it a try!

    British English may have come first, but around the world, the American way of spelling is now far more popular.

    A recent examination of the English language shows that publications now largely use the American version swapping words like “centre” for “center” after the 1880s. To get data, researchers used Google's Ngram Viewer to analyze the words found in all English-language publications from 1800 to 2000. Entering a word into the viewer will show how frequently it occurs within the massive corpus(语料库)of books around the world.

    According to the data, this shift was further strengthened around World War I. Since then, English-language publications have preferred “gray” and “flavor” instead of “grey” and “flavour”. The American spelling has continued to grow over the years, with “liter” passing “liter” around 1900, and “center” becoming the more common choice over “centre” in 1913. “1913 marked a turning point in British spelling, as the American alternative became more frequently used in literature,” the post explains, in regard to “center”. This was just a year before the beginning of World War I, which many views as a key period in America's rise to superpower status.

    Though this switched again between 1920s and the late 1930s, the American, spelling took over for good around 1940, during which time the spelling “airplane” shifted dramatically over “aeroplane”.

    Ever since the middle of the 19th century, even the British Isles have slowly rejected the old spelling. The future is gray for British English.

    Young people's mental health is of increasing interest and concern to researchers, policymakers, and families alike－but can treating teenagers' mental health problems also improve the wellbeing of their parents? New research suggests that it can. The study, conducted by Kelsey Howard, a doctoral candidate at Northwestern University, found that regardless of which treatment teenagers were using for their depression, the mental health of their parents improved too.

    Older findings say that there is a link between mothers' depression and major depression in their teenagers, although it seems not to be biological. However, the latest research suggests that the relationship between parents' and their children's mental health might work in the other direction too.

    While Howard's research hasn't evidenced a clear reason for this trend, she told The Atlantic: “If the family members interact with (交往) each other well, the kid will be more pleasant to be around and make less negative statements, which will affect how other family members think.”

    Tom Madders, director of campaigns at YoungMinds, told HuffPost UK that for parents, watching their children go through mental health problems can be difficult, especially if they feel responsible. Madders also noted that parents often make big lifestyle changes, say, giving up their jobs, to support their children with depression, particularly in cases where their children have to leave school because of their mental health problems. However, Madders thought this can only make things worse. “Parents' sacrifice adds pressure to the delicate shoulder owners,” he said.

    The process of waiting to get treatment can also be an added stressor: “Every day we get calls to our helpline from parents whose children have been waiting months for an initial assessment, or left on long waiting lists for treatment that they need … that's why it's important that the Government commits to long-term extra investment in children's mental health services.”

    Scientists think that growing garden grass could be the secret to solving our energy needs, and we may soon be able to replace our gasoline with "grassoline".

    The team, including experts from Cardiff University in Wales, has shown that hydrogen can be taken from grass in useful amounts with the help of sunlight and a cheap catalyst(催化剂) —something that speeds up a chemical reaction without being used up.

    It is the first time that this has been shown and it could lead to a sustainable(可持续的) way of making hydrogen, reported Asian News International. This could be an important kind of renewable energy because it is high in energy and it does not give out harmful gases when it is burned.

    Study co-author Michael Bowker said, "This is really a green source of energy. Hydrogen is seen as an important future energy carrier as the world moves from fossil fuels to renewable energy, and our research has shown that even garden grass could be a good way of getting it."

    Cellulose(纤维素), which is a key part of plants and the biopolymer(生物聚合物) found in the largest numbers on the earth, could be a great source of hydrogen.

In its study, the team looked at the possibility of getting hydrogen from cellulose using sunlight and a simple catalyst.

    This is called photocatalysis(光催化作用) and in it, the sunlight starts the catalyst, which then makes cellulose and water into hydrogen. The researchers studied the effectiveness of three metal-based catalysts, of which nickel(镍) especially interested the researchers, as it is a much more common metal than gold and palladium(钯) and it saves more money.

    According to Bowker, producing hydrogen from cellulose using photocatalysis has not been studied in detail. The team's research shows that large amounts of hydrogen can be produced using this method with the help of a bit of sunlight and a cheap catalyst.

    The study shows that it is effective to use real grass taken from a garden. "This is important as it avoids the need to separate and clean up cellulose, which can be both difficult and costly," said Bowker.

    Americans think much about time .From children they learn to value( 珍惜) time .As children, they are taught to be on time to go to school, to work and to do everything .When they are having a good time , they say that time flies .When a person is dying, they say he is living on borrowed time.

    Time is money. Time is knowledge. Time is everything in America. A working American has to work hard for 8 hours a day or 40 hours a week. This is the working time. In his spare time, he also works hard for money .Even on Saturday and Sunday he also works hard as usual. In the street you can hardly see that a man walks slowly. They walk very fast. In fact, they are running.

    They love time because time can bring money and a lot of things .But sometimes they also hate time, because they feel they have become servants of the clock.

    A name is more than just a word. It carries the weight of a person's whole identity. A name can represent a person's ethnicity (种族身份) and culture, or show respect for their ancestral roots. A self-given name may represent a person's beliefs or chosen identity.

    Everyone has the right to have their name pronounced correctly. It is a sign of respect for a person's individuality. "A person's name is to him or her the sweetest and most important sound in any language," Dale Carnegie writes in his book How to Win Friends and Influence People. Behind each name is a story, and when a name is anglicized (英语化), mispronounced, or ignored, that story is dismissed.

    A name mispronounced for a long time can negatively impact a person's attitude toward their own identity. It can create feelings of shame or embarrassment because they are made to feel like a burden. In the long term, this might cause someone to distance themselves from their roots. They may begin shying away from their native language, culture, and family for the sake of fitting in.

    In order to avoid this, many international students living in the U.S. choose English names. People shouldn't have to ignore their identities for the sake of someone else's convenience.

    Everyone makes mistakes, and not everyone can get a name right on the first try. Mispronouncing a name repeatedly, however, shows a lack of effort. It is not okay to be comfortable with mispronouncing names, and being unfamiliar with a language is no excuse.

    If you're unsure whether you're pronouncing a name correctly, just ask. Think of it as a way to expand and strengthen understanding, both personally and culturally. When meeting someone for the first time, make sure that you heard the name correctly. It doesn't take a lot to simply repeat the name back. Spell it out. Write it down. Do whatever you have to do to get the name right. Making the effort to correctly pronounce someone's name is an essential part of cultural competency (文化素养). Without this, we cannot expect to show respect and tolerance for our diverse community.