For as long as I can remember, I've always wanted a personal motto. I wanted a saying that I could really try to live my life by. I mean all the humorous book and storybook heroes always have a personal principle they follow. Good manners! Courage! Keenness! But a part of me could never get myself to create my own motto because I never knew where to start and I never thought I could give one.

    “With great power comes great responsibility.” is a quote by the great writer and philosopher, Voltaire. More familiar, it makes an appearance in the modern day movie performance of the superhero Spider-Man. This saying provides a sense of responsibility for those with actually limitless power.

    “Be good to others and others will be good to you.” is another well-known proverb that has roots in almost all of the major religions. Although it is less practiced today than it is lectured, it is a powerful and good motto to live by. Kindness, in this sense, is the final power in judging every action.

    My personal motto today has an idea – being efficient. Through my limited knowledge, I have come to find that this is simply the best way for me to give insight about who I am and what I believe in.

 Efficiency is a quality that everyone desires for, right? Who doesn't want to be able to not only work fast but to achieve great results? To some, it may appear to be a frightening journey. But to me, it means that I have a lifelong journey to improve the methods and ideas with which I come near my tasks.

    Regardless of what motto you want to live by, I believe that everyone should have one, or two or more. These are all symbols of a perfect story of us, in our own view. And it immediately provides insight to the type of person we were, we are and what we strive to be. We are never meant to be perfect, but it is important to try and live by a belief that will help us reach our potential. All you have to do is know what your excitement is and live by it.

    Researchers at Brigham found about one in five teenagers now have some degree of hearing damage. The researchers did not say why hearing loss has risen, but other experts have strong suspicions. One likely culprit, they say, is MP3 players.

    An MP3 player can be dangerous to hearing when its decibel level is turned up too high. High-decibel sounds can damage nerve endings, called hair cells. If a sound is loud enough, the damage can be permanent. A loud sound can shake the membrane (薄膜) on which the hair cells sit- “like an earthquake”. That shake can break or even uproot hair cells. When that happens, the hair cells are finished. Human ears cannot regrow hair cells. Therefore, when listening to an MP3 player, set a volume limit and avoid exposure to loud sounds.

    On the other hand, the loudness of today's music may not be totally under your control. Music companies have been purposely turning up the volume. It's a trend called the fight for loudness.

    Play a CD from the 1990s. Then play a newly released tune. Don't touch the volume control. You'll probably notice that the new CD sounds louder than the old one. Why? Sound engineers who create CDs are using dynamic range compression (压缩), a technology that makes the quiet parts of a song louder and the loud parts quieter. The overall effect of compression is a louder recording.

    Many musicians and sound engineers aren't pleased. They say that compression is driving down the quality of today, s music, making it sound flat and blaring. Gray Hobish, a sound engineer, explains that music should be a combination of loudness and softness. But music companies want to make music louder so it will stand out. That's important in the competition among recording companies.

    What about listeners? Many teenagers listen to music on the go in noisy places and through headphones, all of which reduce sound quality. So young listeners may not notice the poorer quality of modem recordings. “To their ears,” says Hobish, “the music sounds fine. And they are not aware of the hidden threat of the music they are enjoying.”

    Traveling abroad for leisure is becoming more and more popular for Chinese. The UK is high up in the list of places that the Chinese want to visit. There is a sense of mystery about the UK: it's often the images of England's green parks, countryside and Victorian houses that people point to as an alternative to polluted, overcrowded cities such as Beijing and Guangzhou.

    The capital is viewed as modern and dynamic, while being filled deep with history. When asked what other images are thought of by the UK, the reply is often "the Queen, tea and Oxbridge". So what's stopping them actually coming? Sebastian Wood, the British ambassador in Beijing, has described the UK as a "fortress", and while this is perhaps an exaggeration (夸张), Britain does have a reputation as a country that is harder to access.

    The main problem for Chinese tourists is obvious. Although visa applications are now completed online, visitors are still required to visit one of 12 UK centers across the country for a face-to-face interview and fingerprinting. If you don't live near one of these centers already, you'd have to travel some distance to get there.

    Another problem is also to be mentioned. If travelers from China visit the UK, they also want to cover as much ground as possible. But the UK is not included in the Schengen visa, which allows access to a host of 26 European countries such as France and Germany. So it makes the former seem less worth it.

    There is also the issue of cost:￡47 for a Schengen visa, ￡82 for the UK. On top of this, the UK is viewed as stricter in its handling of visas compared with the rest of Europe, fed by urban legends of rejected applications. In the end, the decision comes down to one question: Is Britain worth a visit?

    As children we are well-trained to find the right answer. We are rewarded for A's, the honor roll and acing the test. Our education trains us to follow the rules and deliver the expected answers. When we do, awards and congratulations follow. Yet when we grow up, it gets a little harder. Life and careers don't have tests with an A if we get the "right" answer.

    I recently had coffee with a college student who will graduate. She is struggling with what she wants for her career. She wants her parents to be proud of her and to continue the success she has had in school. She also talked about other students in her graduating class who are set to do "some big things," like working for impressive companies. Yet she wasn't sure of the right answer for using her degree. She said that deep down she was hoping that someone might give her the answer.

    We both agreed that it comes down to not looking for the right answer, but her answer. The grown-up definition of the "right answer" is different than that in school. What would you do if you weren't afraid? It takes time to know these answers. And they can change over time and at any point in your career. My encouragement is to get valued advice and input, of course, but finally to look within yourself for the answers. It helps to come back to:

What do I want to be known for? What is my definition of success? What am I best at?

    If I had no fears, what would I do?

    What is one step I can take today to move me toward my goal (even if it's not perfectly clear)?

    I find these types of questions are more helpful at getting to our unique answer rather than "right answer" questions, such as: What will my parents want? What degree or job will mark me as accomplished to the world? What is my best option based on where I work today?

    In this Pennsylvania city, Pittsburgh is shrinking but getting wealthier. Since 2000, its population has declined by 95,000 while its income per capita (人均) has shot up 24 percent. The trend is taking hold in many other cities, like Buffalo in New York, Providence in Rhode Island and New Orleans.

    Some of these areas have created more high-paying jobs in energy, health care or education. Others have managed to reshape their producing industry for a new economy. Higher-paying jobs have a greater effect because they create demand for additional services. "The story in Pittsburgh is very positive, and other areas are looking at it as an example of the transformation that might be possible," said Guhan Venkatu, who wrote an economic history of the area called “Rust and Renewal" for the Federal Reserve Bank of Cleveland.

    Carnegie Mellon University and the University of Pittsburgh have helped bring tech jobs and innovation(革新) to the area by sponsoring tech centers that help graduates start companies without moving to Silicon Valley or San Francisco. This has helped keep Pittsburgh's educated young population growing even as the entire population in the city has dropped.

    Pittsburgh has more STEM (science, technology, engineering and math) jobs than other shrinking cities, about 80, 000 or 7% of all jobs. STEM jobs add productivity and income growth to the area. Manufacturers of high-tech medical equipment in the Pittsburgh area also have doubled employment in the last 10 years.

    However, some experts question whether growing income per capita can really make up for a declining population. According to Patrick Adler, a researcher at the University of Toronto, population loss does matter if it means lower-skilled workers have fled because of a lack of opportunity. What's more, high-paying jobs in education and health care can disappear if the population declines too greatly. So it'd be wise to find ways to increase the population.

    Some people have a very poor sense of direction. Unluckily, I am one of them. I have visited a place many times but I may still get lost there the next time.

    When I was a little girl, I never dared to ask strangers the way. And so I used to walk around in circles and hope that by chance I would get to the place I was going to.

    Now, I am no longer too shy to ask people for directions, but I often receive helpless or even wrong information. So I try to avoid giving people wrong directions. If anyone ever asks me the way somewhere, I would say, "Sorry, I am a stranger here."

    Once on my way to work I was stopped by a man. He asked me if I could tell him the way to the Friendship Building. I gave him my usual reply. But just as I walked on only a few steps, I realized that he had asked the way to my office building. However, I had no time to turn back and look for him. I was rushing to meet with someone at my office and I didn't want to keep him waiting.

    When I just got to my office, the secretary(秘书) showed in the man who had asked me for directions. Imagine how embarrassed I was and how surprised he was when we saw each other at the first sight.