Starting the day on an egg could keep your blood pressure under control, research suggests. Scientists have shown that eggs produce proteins with a function similar to that of powerful blood pressure-lowering drugs.

    The research, from the University of Alberta in Canada, showed that when eggs come in contact with stomach enzymes (酶) they produce a protein that acts in the same way as Ace inhibitors, but more work is needed to show the effects outside a lab and in the human body.

    Earlier this month, British researchers declared that, contrary to popular beliefs, it is healthy to go to work on an egg. They concluded that the type of cholesterol (胆固醇) found in eggs has little effect on increasing heart disease risks.

    Researcher Professor Bruce Griffin, from the University of Surrey, said, "The wrong beliefs linking egg eating to high blood cholesterol and heart disease must be corrected. The amount of fat in our diet has an effect on blood cholesterol that is several times greater than the relatively small amounts of cholesterol found in eggs. The UK public do not need to be limiting the number of eggs they eat. They can be encouraged to include them in a healthy diet as they are one of nature's most nutritious foods."

    The British Heart Foundation dropped its three-egg-a-week limit in 2005. However, almost half of Britons believe the limit still applies.

    Once when I was facing a decision that involved high risk, I went to a friend. He looked at me for a moment, and then wrote a sentence containing the best advice I've ever had: Be bold and brave and mighty (强大的) forces will come to your help.

    Those words made me see clearly that when I had fallen short in the past, it was seldom because I had tried and failed. It was usually because I had let fear of failure stop me from trying at all. On the other hand, whenever I had jumped into deep water, forced by courage or circumstance (环境), I had always been able to swim until I got my feet on the ground again.

    Boldness means a decision to bite (咬) off more than you can eat. And there is nothing mysterious about the mighty forces. They are inner powers we have: energy, skill, sound judgment, creative ideas––even physical strength greater than most of us realize.

    Admittedly, those mighty forces are spiritual ones. But they are more important than physical ones. A college classmate of mine, Tim, was an excellent football player, even though he weighed much less than the average player. “In one game I suddenly found myself facing a huge player, who had nothing but me between him and our goal line,” said Tim. “I was so frightened that I closed my eyes and crazily threw myself at that guy like a bullet (子弹) ––and stopped him cold.”

Boldness—a willingness to get yourself to the extreme—is not one that can be gained overnight. But it can be taught to children and developed in adults. Confidence builds up. Surely, there will be setbacks (挫折) and disappointments in life; boldness in itself is no guarantee (保证) of success. But the person who tries to do something and fails is a lot better off than the person who tries to do nothing and succeeds.

    So, always try to live a little bit beyond your abilities — and you'll find your abilities are greater than you ever dreamed.

    As a capital city full of art and history, London is an important political centre and a huge financial marketplace. Whatever you think about London, visiting as a tourist is very different from living there. Each part of London has its own character. Some parts are richer than others, or more industrial, or have better housing.

    Let's start with the centre, the “Square Mile”. This is the oldest part of London. In the past, it was where all financial business was done. Not many people live here, but 300,000 people work here every day.

    Moving west, we come to the West End. This busy shopping and entertainment district is bursting with things to do. Take a walk down Oxford Street, and you will see big department stores like Selfridges and Harrods. Rents here are very high; a one-bedroom apartment may cost around 1,000 pounds a week. Further away is West London. This area is more residential(住宅的)and very fashionable.

    The East End contains the Port of London, which historically is where many immigrants first arrived. Waves of French, Belgians, Jews, Pakistanis and Bangladeshis have all lived here. This makes the culture of this area very various. London won the bid to hold the Olympics in 2012, so many Londoners hope that housing, education and employment for many people in this area will improve.

    It is difficult to be general about London. The city is made up of a " collection of villages”, each area with its own character and community. Put them all together, and you have London, an international capital.

    A food chain is a simple way of explaining how each living thing gets its food. For example, a simple African food chain might consist of three parts: first, trees and bushes; second, giraffes; and third, lions. Each link in a food chain is food for the next link. Food chains always start with plants and end with animals.

    Plants are at the bottom of the food chain. Scientists call them producers, because they use light energy from the sun to produce food from carbon dioxide and water through photosynthesis（光合作用）. Animals, unlike plants, can't produce their own food. Instead, they must eat plants or other animals. This is why scientists call them consumers.

    Consumer animals fall into three categories. Herbivores（食草动物）eat only plants. Carnivores（食肉动物） eat only other animals. Omnivores eat both plants and animals. In addition to producers and consumers, there are also decomposers(分解者).These organisms, such as bacteria and fungi, feed on decaying(腐烂) matter. They help the food chain by speeding up the decaying process that releases minerals back into the soil to be absorbed by plants as nutrients.

    Most food chains have only four or five links in them. As you go up a food chain, the amount of energy at each level diminishes, because some of the energy is lost in the form of waste or is used up by the organism at the level. That is why it takes many plants, for example, to feed a few giraffes who in turn feed one lion.

    Most animals are part of many different food chains, because they must eat more than one type of food to satisfy their energy needs. All of these interconnected food chains form a more complex structure called a food web. Humans, for example, are at the center of a very complex food web, because we tend to eat many different types of plants and animals.

    At a comedy night at Johns Hopkins Univerity in Maryland, members of the school's comedy(喜剧) club bring lots of laughter to their classmates with funny speeches and humorous body movements. These college student comedian's humour entertains busy, young people and eases their stress.

    Yet the club member Arella Shua says comedy is serious work. Every comedy starts as an individual project-- each member writes their own material. Then they try it out in weekly club meetings where all club members read the material, going joke by joke and seeing what works and what doesnt. Nothing unsatisfactory will be compromised(妥协). In this way comes a satisfying comedy.

    Ariella joined the club last year. Now she does not go anywhere without bringing something on which she can take notes. "Whenever I just have a thought in my head or when I see something or overhear someone saying something in the library, I just put it down, "Arielae explained. "when I'm trying to write my own set, I go through that……to see if there is anything in there that I can use."

    Club president Nicholas Scandura finds writng one of the many skills he has developed since joining the club."Writing jokes takes a lot of critical thinking." he said. The club gives its members a sense of community. When they meet, they share funny experiences. tell jokes and laugh.

    Harry Kuperstein discovered the club was a natural fit. Noticing the funny qualities of different situations improved his way of looking at the world. Becoming an active member also helped him work on the future skills he'll need as a medical doctor. "Having jokes ready to go might help smooth these interactions and make you a better public speaker, " he said.