While sweet treats can be hard to resist, the World Health Organization(WHO) has set new guidelines for people around the world. The guidelines, released on Wednesday, advise that both adults and children cut back on their sugar intake(摄取量) to stay healthy.

    In a statement, Francesco Branca, director of the WHO's nutrition department, said there is evidence that reducing daily sugar intake reduces the risk of being overweight and tooth decay(腐烂).

    The guidelines do not apply to the sugars in fresh fruit and vegetables or those that are naturally present in milk. According to the WHO, there is no reported evidence of negative effects of consuming those sugars. Instead, the new guidelines focus on “added” or “free” sugars. These include sugars that are added to processed foods and drinks such as candy and soft drinks.

    Added sugars are sometimes described as “ hidden” sugars because they exist in foods we might not think of as sweets, such as honey and ketchup(番茄酱). Health experts advise that consumers look at ingredients on food packages to help make better-informed decisions.

    The WHO recommends that people in the United States, Europe and other Western societies should cut their average sugar intake by about two-thirds, or down to just 10% of their overall calories. For developing countries, where dental care is less advanced, the WHO recommends that sugar intake be reduced to 5%.

    Scientist Kieran Clarke, of the University of Oxford, notes that for those people who can't shake their love for sweets, getting more exercise is a good solution. “If you get enough exercise, you can eat almost anything,” she said “But it's very hard to avoid large amounts of sugar unless all you're eating is fruit and vegetables.”

    From Dusner (3 speakers) to Kelabit (5 thousand) to Yiddish (1.5 million), these languages are spread, but like the Indian elephant, they are in danger of dying out. Dr. Chris Mazdzer, a researcher at Oxford University, organizing a meeting on endangered languages thinks there could be a novel way to keep minority languages alive: social media. He says, “Because young people text each other how they speak, even if they don't know how to spell it.”

    Minority languages are often at risk of being drowned（淹死）out by the bigger ones, which are spoken at school and in the media. But the appearance of Facebook and Twitter might just have the unexpected effect. Dr. Mazdzer speaks Frisian, which has 350,000 speakers. Communicating with his own language has given him thought about how languages could be saved in the future. “In Friesland, young people who don't learn much Frisian at school send each messages on social media in Frisian”, he says. In this way, a new generation of Frisian speakers keeps the language alive.

    Though many of these languages only have a few speakers, it's not just a small number of speakers that make a language endangered. Some languages were once widely spoken, but lost speakers over time. This can happen for many reasons, like only one language spoken in school or people moving away from their home and losing their language.

    Tweeting and texting in Frisian (or Sorbian, or Breton) is not enough in the long term, though. There are many other things we need to do. But why is a language worth saving in the first place? Because our languages are natural creations. Natural beauty needs to be protected.

    I chose to take psychology because one is able to better understand himself, understand others, and learn how people think, so I can use that to my advantage in the business world.

    {#blank#}1{#/blank#}By learning psychology I will learn how and why I think the way I think. This is important to me because I want to know whether my up-bringing or the genes I possess from my parents influence me.{#blank#}2{#/blank#}I hope to find an answer this year through my studies.

    I also think it is important to be accepting and tolerant of others and their certain beliefs about different matters. Some people like activities and subjects that I may not entirely agree with. It is important to learn why they believe what they do. People are different throughout the world. {#blank#}3{#/blank#} I would like to learn what customs, traditions, and ways of thinking are witnessed worldwide and why some are apparent one place but not another.

    My final reason for taking psychology is that I can better understand people from a business standpoint. {#blank#}4{#/blank#} Knowing how they think will help in making major marketing and promotional decisions. I hope to learn how people react to certain situations or ads to see what will get them interested.

    I know the effort I put into this course will benefit me later in life. Of course, learning the course may be challenging at times. {#blank#}5{#/blank#}

A. If I had to predict, I would say a mix of both.

B. But there are similarities between them.

C. Psychology is beneficial to my future.

D. Positive psychology has developed rapidly via the Internet.

E. It is vital to know what consumers want and need.

F. I often wonder why I like the items, subjects, and activities that I do.

G. However, what I learn will influence my future decisions and goals.

    When slaves were first brought over from West Africa to the southern parts of America, they brought along with them aspects of their own culture—religion, dance,language, music, and cuisine.A mix of the two cultures eventually appeared.The religious dance of the ring shout turned into modern dances like the Charleston, and tribal chants slowly transformed into sorrowful hymns (圣歌) sung by slaves that described their hardships.

    These soulful accounts by slaves of the severe climate and conditions began to be called “the blues”,which continued in popularity among African Americans after the Civil War.This music increased in popularity into the early 1900s when many black musicians became an important part of the music industry.

    The slaves that had been brought over were from all different regions of West Africa, but they worked together until they gradually formed a common culture.This strengthened the identity of their music that, in the 1950s, eventually led to the beginning of rock and roll.The Beatles, the most influential band of the 1960s, are often determined as the accelerator that resulted in the ideology (意识形态) surrounding music that is still around today.The freedom and individuality associated with that time period brought forth a whole culture surrounding music.It was not just music any more, but a lifestyle.

    Over the decades, music has developed into such a vital part of society and pop culture.Musicians are glorified, with tons of adoring and screaming fans.The modern technology of present day has allowed for a greater gap between the creator of the music and the fans, as well as a widespread commercialization of music.However, criticisms of modern pop music often arise due to its mass production, and now there is a lack of the same soul and quality of naturalness and simplicity in music that was rising in the early 20th century.

    The ocean bottom, a region nearly 2.5 times greater than the total land area of the earth, is even today largely unexplored. Until about a century ago, the deep ocean floor was completely inaccessible and hidden beneath waters averaging over 3,600 meters deep. Totally without light and in the case of intense pressures hundreds of times greater than at the earth's surface, the deep-ocean bottom is a strange environment to humans, in some way, as fighting and remote as the outer space.

Although researchers have taken samples of deep-ocean rocks for over a century, the first detailed global study of the ocean bottom did not actually start until 1969, with the beginning of the National Science Foundation's Deep Sea Drilling Project(DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP's drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean's surface and drill very deep waters, taking samples of rocks from the ocean floor.

    The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, it sailed 600,000 kilometers and took almost 20,000 samples of rocks around the world. Those samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to make out what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger's voyages, nearly all earth scientists agree on the theories of plate tectonics (构造学) and continental drift that explain many of the geological processes.

    The sample of rocks drilled by the Glomar Challenger has also provided a climatic record stretching back hundreds of millions of years. The information of past climatic change can be used to predict the future climate.

    Crossing your legs is an extremely common habit; most people don't even notice that they're doing it when they sit down. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.

    A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. The reason for this is that the blood in your legs has to work against gravity to be pumped back to your heart and that crossing one leg over the other increases resistance(阻力), making it even harder for the blood to circulate. This causes your body to increase your blood pressure to push the blood back to the heart. You won't feel any immediate effects, but repeated, drawn-out increases in blood pressure can cause long-term health problems. So, planning to sit for a long period of time? Don't keep your legs crossed.

    Crossing your legs at the knee can also cause pressure on the major nerve in your leg that passes just below your knee and along the outside of your leg, explains Richard Graves, a medical expert. This pressure can cause numbness and temporary paralysis (麻痹) of some of the muscles in your foot and leg, preventing you from being able to raise your ankle—what we know as that “pins and needles” sensation. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage.

    So next time you sit down, try to get yourself in the habit of sitting with both of your feet on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.