After I mastered my first (协奏曲) at age 14, my parents decided to get me a nice violin. I tried out dozens of instruments before I found my match: a German violin. It was beautiful, but what I liked best about it was its voice. Confident and strong, it was everything I longed to be.

    I'm not sure how much that violin cost, but my parents made me promise never to let it out of my sight. They didn't understand that dragging a large violin case ran counter to my daily middle school task of being invisible (看不见的). I was a strange, absent-minded kid. When I spoke up in class, my comments brought confused silence from teachers and wild laughter from students. Like a deer in a wolf pack, I tried to be quiet and still.

    In contrast, my new violin was almost shockingly loud. Together, we could drown out the rest of my middle school orchestra(管弦乐队) — which was encouraged, since the other kids made sounds like cats' crying. For one glorious hour every day, I was showered with attention. Everyone wanted to hear what I had to say.

    Between classes, I bent under the combined weight of my violin case and a backpack filled with books. My posture suffered, but my confidence grew. With my violin by my side, I found my voice. More and more, I contributed to class discussions and even made a couple of friends.

    Today, I'm just an amateur violinist with a regular day job. As I sit in my community orchestra, sometimes I feel jealous(嫉妒的) my fellow musicians' instruments with their elegant voices. I may not be the best violinist around, but at least I'm still the loudest.

    It seems that no one can live a happy life without friendship. While a great number of people expect others to be their friends, they don't give friendship back. That is why some friendships don't last long. To have a friend, you must learn to be one. You must learn to treat your friend the way you want your friend to treat you. Learning to be a good friend means learning three rules: be honest; be generous; be understanding.

    Honesty is where a good friendship starts. Friends must be able to trust one another. If you do not tell the truth, people usually find out. If a friend finds out that you haven't been honest, you may lose your friend's trust. Good friends always depend on one another to speak and act honestly.

    Generosity means sharing and sharing makes a friendship grow. You do not have to give your lunch money or your clothes. Naturally you will want to share your ideas and feelings. These can be very valuable to a friend. They tell your friend what is important to you. By sharing them, you help your friend know better.

    Sooner or later everyone needs understanding and help with each other. Something may go wrong at school. Talking about the problem can make it easier to solve. Turning to a friend can be a first step in solving the problem. So to be a friend you must listen and understand. You must try to put yourself in your friend's place so that you can understand the problem better.

    No two friendships are exactly alike. But all true friendships have three things in common. If you plan to keep your friends, you must practice honesty, generosity and understanding.

    People say that text messages and e-mails lack emotion compared to phone or face-to-face conversations. But one thing seems to improve it – the emoticon(表情符).

    These little symbols – whether it's a wink(眨眼); -), a smiley : -) or a sad face : -) - always add a little something to whatever you are sending out, making it more expressive than cold words on a screen.

    To be sure, emoticons have changed the way that we communicate with each other. But there is more: a new study found that they are even changing how our brains work – we now react to emoticons in the same way as we would to real human faces, reported Live Science.

    It's actually amazing when you start to think about it: what an emoticon consists of is simply three punctuation marks(标点符号) – on their own, they carry no meaning as a pair of eyes, a nose or a mouth, but after they were first put together as symbols for faces in 1982, they began to appear more and more in our written materials.

    Owen Churches, a scientist at Flinders University in Australia, wanted to find out what people see in emoticons that make them so popular. So he showed 20 participants images of real faces, a smiley emoticon and a series of meaningless characters while their brain activities were monitored.

    Previous studies have already shown that our brains process human faces differently than they do other objects – they analyze the position of the mouth relative to the nose and the eyes to “read” for emotions. As a result, certain parts of our brain, such as the occipital-temporal cortex, are activated(激活).

    When Churches compared participants' brain activities, he was surprised to find that the brain areas that were activated when people looked at smiley emoticons were the same as when they were shown pictures of real faces.

    According to Churches, this is a good example of how culture is shaping our brains. “Emoticons are a new form of language that we're producing,” Churches told ABC Science. “Before 1982 there would be no reason that ':-)' would activate face-sensitive areas of the cortex, but now it does because we've learnt that this represents a face.”

    Next time you chat with your friends online, try to use emoticons where they are needed. It'll be almost like you're smiling or winking at them yourself.

    The impression you make at the beginning of an interview is very important. Employers often decide to hire someone in the first three minutes of the interview. They judge you by your appearance, attitude and manners.

    A friendly smile when you walk into the room is important. A smile shows a confident and positive attitude. When you introduce yourself, make eye contact with the interviewer. Some interviewers offer a handshake. Others don't.

    Try to be as natural as possible. But pay attention to your body language. The way you sit, walk, gesture, use your voice and show feelings on your face is all part of your body language. It makes the interviewer know how you feel about yourself and the situation you are in. Are you feeling positively about yourself？Your abilities? Your interest in the job？

    Speak clearly and loudly enough. Show interest and enthusiasm in your voice. When you speak, look at the interviewer. Also, don't say negative things about yourself, or former employer.

    Listen to questions carefully. If you don't understand a question, ask the interviewer to repeat or explain:

    "I'm sorry, but I didn't catch that."

    "Almost everyone is nervous in a job interview. Interviewers know that. They don't expect you to be totally calm and relaxed. But they expect you to try to control your nervousness. They expect you to show confidence in your ability to do the job.

    At the end of the interview, thank the interviewer for her or his time. It's a good idea to send a short thank-you letter right after the interview, or deliver it by hand.

    Phone the company if you have not heard anything after one week. Ask if they have made a decision about the job.

Good luck!

    If you could have a superpower, what would it be? Other than flying and communicating with someone from his mind (which, let's be honest, would probably actually be awful), breathing underwater is one of the favorites. You can hang out with Aquaman and Ursula, and when the end of the world comes and we're all living under water, you'll be fine.

    With this in mind, a student at the Royal College of Art, London has designed a 3D-printed amphibious garment called AMPHIBIO —essentially a set of gills (鳃) —for this very purpose. According to Jun Kamei, a biomimicry designer and materials scientist, it is "for a future where humankind lives in the water".

    With the world set for a global temperature increase of 3. 2℃ (5. 7℉) by 2100, rising sea levels are a very real threat to large coastal cities, potentially affecting up to 2 billion people —or 26 percent of the current global population.

    Kamei's little device uses a specially designed porous (多孔的) material that fills oxygen again in the water and releases carbon dioxide. It is inspired by water-diving insects that create their own little scuba diving set by creating a protective bubble of air around their body thanks to their water repellent (防水的) skin.

    The technology is easily 3D-printable too, which will be great when we need them together. These "gills" could replace heavy and clumsy scuba equipment, making it more similar to free diving but for longer. This could have immediate applications for underwater rescue plans —the 12 boys rescued by divers from a flooded cave in Thailand, for example, where it took weeks to work out how to get the boys and the vital breathing equipment through those narrow tunnels.

    So far, the tech has only been tested as a working prototype, not actually on humans, so the dream may have to be on hold for now. And scaling up and testing on humans is Kamei's next plan. This may sound unbelievable, but Kamei insists he has a much more optimistic vision of the future.

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