Now, a new study suggests that coffeefans can make their drink taste sweeter by simply changing the color of theircups.

Scientists claim that blue and glass mugs,which are popular in some coffee shops, can reduce coffee's bitterness, withoutany need for sugar, and that coffee drunk from white cups tastes the bitterest.

    To prove their claims, the researchersinvited 36 volunteers and used three different colored cups— blue, white andtransparent glass—to do an experiment.

    In the experiment, coffee consumed fromthe white cup was found to taste less sweet when compared to the other twocolored cups, while the blue cup made the coffee taste the sweetest.

    The scientists believe that the colorbrown may be associated with coffee's bitterness because coffee in a white cupappears the brownest and tastes the bitterest.

  “Our study clearly shows that the colorof a coffee cup does influence the perceived (感受到的) taste and flavor of coffee,” said DrGeorge Doorn of Federation University Australia, “but the potential effects maybe different between a one-time purchase and a return customer.”

  “Anyhow, the effect of the color of thecup on the flavor of the coffee suggests that café owners, baristas (服务员), aswell as coffee cup manufacturers should carefully consider the color of theircups, ” he added.

    However, the idea that color can alterthe taste of food and drink is not new.

    A study published last year revealedthat red, strawberry-flavored mousse (慕斯蛋糕) served on a white plate was rated as10 percent sweeter and 15 percent more flavorous than the same food presentedon a black plate.

    Miles was born in Alton, a city on the Mississippi River in Illinois on May 26, 1926. Miles's father was a dentist, while his mother was a music teacher. Miles had a good childhood, catching fish and riding horses with his older sister and younger brother. He was known as a naughty boy in school.

    He recalls his story, “By the age of 12, music had become the most important thing in my life.” His mother, a violinist herself, dearly wanted her son to play the violin. But brass (铜管) was Miles's calling, and he remembers arguments between their parents as his dad overruled her to fight his son's corner. He received his first trumpet (喇叭) in 1935 and began weekly music lessons with his father's friend Mr. Elwood, his life-long teacher.

    Talking about his school days, Miles said that Mr. Buchanan was the biggest influence on his life. He was the person who took Miles all the way into music at that time. He wanted to be a musician that he had dreamed.

    When he was 16, Miles met his girlfriend, Irene Birth. Although she was a beautiful young woman in many ways, it was her easy-going character that attracted Miles. At the weekends, Miles and Irene would take the bus over the Mississippi River to St Louis to watch movies and go dancing. Although Miles was too shy to really enjoy dancing, he always felt confident when he danced with Irene.

    When he turned 17, she persuaded him to ask for a job in his band—Eddie Handle's Blue Devils. It worked. Joining the band was a breakthrough for Miles, and marked the time when he first began to write and arrange music.

    What is it that makes people laugh? More than two thousand years ago the ancient Greek philosopher Aristotle defined (定义) jokes as the pleasure that results from a feeling of triumph(胜利) by showing we're better than someone else in a certain way. According to Aristotle and many other philosophers，all jokes depend mainly on showing inferiority in another person or group of persons—that is，putting it clearly，on showing that they are worse off than ourselves. Jokes raise our good opinion of ourselves at someone else's expense.

Showing how much better than other people we are is only one reason we like jokes. Someone may also use a joke to express their anger or their cruelty or any other kind of action that is not acceptable to us. We feel free to laugh when we hear about someone sliding on a banana skin. The joke lets us express those attitudes which are usually unacceptable to society. This is probably the reason why some of the jokes，especially those involving cruelty，are so popular with certain people.

    Besides，all jokes depend on our enjoyment of laughing at something that is strange and out of place because it's different from things which are happening around it. The same situation can be either sad or pleasant，depending entirely on how strange and out of place it is. If a girl in a bathing suit falls into a swimming pool，we don't laugh because nothing unusual has happened. But if a man in a smart suit falls in，the situation is at once unusual in a pleasant way and we laugh. A good joke-teller will always try to build up a situation in which one thing is expected until something unexpected suddenly happens，and so we laugh.

    Our world natural park is one of the most famous parks in the world. Millions of visitors from different countries visit this park every year. In order to protect it, please do as follows：

    Protect the natural and cultural heritage. Don't damage or deface any buildings, displays and other facilities. Take care of all plants. Put rubbish in the bins provided.

    Take care when you are going up and down steps or stairs and when you are walking nearby the waters.

    Please buy tickets before entering the scenic spot. One ticket is only for one person. Adult：＄60 per ticket. Children over 6 and under 18, half price. People over 60 and children under 6 are free.

    If you are going into the wooded and hilly lands, for your own safety, please go with three people at least and don't take any tinder(易燃物）along with you. The hill is steep so please take care of yourself.

    This scenic spot is the reserve of water source: No fishing, swimming, washing and any behaviors that are harmful to the water source. Meanwhile, please follow the management rules of the scenic spot conscientiously.

    Opening time：From Monday to Friday, 8：00 a. m.～18：00 p.m.；From Saturday to Sunday, 6：00 am.一24：00 p. m.

    Small animals such as rabbits, peacocks, squirrels, frogs must be taken care of: None of them shall be killed.

    If you have any trouble in visiting our world natural park, please call 477-866-7044. Our staff will do our best to help you.

    Have you ever pressed the pedestrian button at a crosswalk and wondered if it really worked? They're called "placebo(安慰剂）buttons"一buttons that mechanically sound and can be pushed, but provide no functionality.

    In New York City, only about 100 of the 1, 000 crosswalk buttons actually function. Crosswalk signals were generally installed before traffic jam had reached today's levels.

    But while their function was taken over by more advanced systems—such as automated lights or traffic sensors — the physical buttons were often kept, rather than being replaced at further expense. Other cities, such as Boston, Dallas and Seattle, have gone through a similar process, leaving them with their own placebo pedestrian buttons. In London, which has 6, 000 traffic signals, pressing the pedestrian button results in a reliable "Wait" light. But that doesn't necessarily mean that the "green man"— or "pedestrian stage" in traffic signal design profession — will appear any sooner.

    "We do have some crossings where the green light comes on automatically, but we still ask people to press the button because that enables accessible features,'' said Glynn Barton, director of network management at Transport for London.

    These features, such as blind tracks and hearable traffic signals, help people with visual disorder cross the road and only function when the button is pressed. As for the lights, a growing number of them are now combined and become a part of an electronic system that detects traffic and adjusts time frequency accordingly (giving priority to buses if they're running late, for example), which means that pressing the button has no effect.

    According to Langer, a Harvard psychologist, placebo buttons give us the illusion (错觉)of control — and something to do in situations where the alternative would be doing nothing. In the case of pedestrian crossings, they may even make us safer by forcing us to pay attention to our surroundings. "They serve a psychological purpose at the very least," she added.

    It's probably my favourite bookstore ever. It's "designed for travelers who like reading". It is famous for its travel book collection. Categorized by country and region, you can find books on history, arts, food, culture, film, literature, and many more topics of the region. It's absolutely fascinating. My favourite is the London literature section near the entrance. It's very tasteful selection and it's a pleasure just to read a few paragraphs while you browse (浏览). The interior is beautiful. Classic wooden counters, wooden floors, shelves and tables of book are organized nicely. Every time I passed by I had to make a stop there. Staff there are helpful and friendly.

    I love the convenience of Amazon but bookstores with special atmosphere like this just cannot be replaced.

——Rachel Z, San Francisco

    I don't read books as often as I would like. I just don't have time, and let's be honest, after doing all my schoolwork. I'd rather just put my brain on coast and read an OK magazine and catch up with some news about film stars. I was brought into Daunt while wandering down the street and it's really just an inspiring place and it actually made me want to "read" something. Really, if you're anywhere near the shop, do pop in and just look around, even if you have a love/ hate relationship with reading like I do. The inside of the shop made me look around as if I remember enjoying as a kid seeing some new big store, when in fact it's not new, but the sight of a bookstore with classic design charm is refreshing after spending so much time in libraries.

    Go and see it for yourself. You won't be disappointed!

——Thomas A, London