Think about the different ways that people use the wind. You can use it to fly a kite or to sail a boat. Wind is one of our cleanest and richest power sources, as well as one of the oldest. Evidence shows that windmills(风车) began to be used in ancient Iran back in the 7th century BC. They were first introduced to Europe during the 1100s, when armies returned from the Middle East with knowledge of using wind power.

    For many centuries, people used windmills to grind(磨碎) wheat into flour or pump water from deep underground. When electricity was discovered in the late 1800s, people living in remote(偏远的) areas began to use them to produce electricity. This allowed them to have electric lights and radio. However, by the 1940s when electricity was available(可利用的) to people in almost all areas of the United States, windmills were seldom used.

    During the 1970s, people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity. People also realized that the supply of coal and gas would not last forever. Then, wind was rediscovered, though it means higher costs. Today, there is a global movement to supply more and more of our electricity through the use of wind.

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    A sense of humor is something highly valued. A person who has a great sense of humor is often considered to be happy and socially confident. However, humor is a double-edged sword. Sometimes it can damage self-respect and annoy others.

    People who use bonding humor tell jokes and generally lighten the mood. They're thought to be good at reducing the tension in uncomfortable situations. They often make fun of their common experiences, and sometimes they may even laugh off their own misfortunes. The basic message they deliver is: We're all alike, we find the same things funny, and we're all in this together.

    Put-down humor, on the other hand, is an aggressive type of humor used to criticize others through teasing. When it's aimed against politicians, as it often is, it's extremely funny and mostly harmless. But in the real world, it may have a harmful effect. An example of such humor is telling friends an embarrassing story about another friend. When challenged about their teasing, the put-down jokers might claim that they are "just kidding," thus allowing themselves to avoid responsibility. This type of humor, though considered by some people to be socially acceptable, may hurt the feelings of the one being teased and thus have a bad effect on personal relationships.

    Finally, in hate-me humor, the joker is the target of the joke for the amusement of others. This type of humor was used by comedians John Belushi and Chris Farley—both of whom suffered for their success in show business. A small amount of such humor is charming, but routinely offering oneself up to be embarrassed destroys one's self-esteem, and fosters depression and anxiety.

    So it seems that being funny isn't necessarily an indicator of good social skills and well-being. In certain cases, it may actually have a negative effect on interpersonal relationships.

    Whenever we see a button, we are eager to press it because we know something will happen. This is true in most cases, for example on a doorbell and on the “on/off” button on the TV. But some buttons are actually fake, like the “close” button on a lift.

    Many people are in the habit of pressing the “close” button because they don't have the patience to wait for the lift doors to shut. But lifts' “close” buttons are a complete scam(骗局), at least in the US-the doors will not close any faster no matter how hard you press.

    It started in the 1990s when the Americans with Disabilities Act was passed in the US, making sure that all lifts stayed open long enough so that people with disabilities could enter. Only US firefighters and repairmen can use the buttons to speed up the door-closing process if they have a code or special keys.

    But to normal lift riders, the buttons aren't completely useless. According to psychologists, fake buttons can actually make you feel better by offering you a sense of control.

    “Perceived (能够感知的)control is very important. It reduces stress and increases well-being,” Ellen J. Langer, a psychology professor, said, “having a lack of control is associated with depression.”

    Experts have revealed that a lot of buttons that don't do anything exist in our lives for this same purpose. For example, many offices in the US have fake thermostats(温度调节器) because people tend to feel better when they think they can control the temperature in their workspace.

    But psychologists found it interesting that even when people are aware of these little “white lies”, they still continue to push fake buttons because as long as the doors eventually close, it is considered to be worth the effort.

    “That habit is here to stay,” John Kounios, a psychology professor, said“Even though I have real doubts about the traffic light buttons, I always press them. After all, I've got nothing else to do while waiting. So why not press the button in the hope that this one will work?”

    In my generation, most people assume. We assume that after getting a driver's license, we should see a brand new car sitting in our driveway. We assume that the latest iPhone product should be in our hands as soon as something goes wrong with our old one. We also assume that college, being as expensive as it is, is given. However, what we don't realize is that all of these things are very special privileges.

    New cars, the latest technology and college fees are something that most people have in the place where I live. I'm not necessarily complaining about this. I live in a very fortunate area, and I try to remind myself of that every day.

    Getting nice things is great, but sometimes, the competition that rules our lives gets too fierce. When someone else gets something great, you begin to think, "Why can't I have that?" When everyone around you goes to college, you think that one day you will obviously do the same, because who doesn't?

    Even now, being almost done with my first year of college, I constantly see people who forget why we're here, and how lucky we are to be on this campus. All of the distractions can surely keep you from doing your best, and they can easily make you forget your real purpose at college. The parties, friends, events, and overall social life can move you into a never-ending whirlpool (旋涡）of not doing schoolwork. Having fun is a part of life, but balance is the key when it comes to college.

    Appreciation nowadays is slowly fading into a distant thought. We constantly forget how lucky we are to have the things and the life that we do. Surely, who doesn't dream of a new car waiting for them, or that brand new iPhone that you see in all of the commercials? But wanting something is different from expecting it. Setting yourself up with an "I should get this" attitude will only push appreciation further away.

    Appreciate what you have, but don't expect what you don't have. Say thank you to those who help and support you, and realize that whoever you are, you're lucky in a great way.

Outdoor Science Field Trips!

    Many students ask for advice about improving their English. There are three basic questions.

    The first question is about real English. Li Hao from Hubei wrote, "I enjoy watching English films and listening to real English songs. But it takes a long time. What do you think?"

    This is a great way to learn English! Talk about the film or song with your friends, and guess the meaning of the new words. Just enjoy yourself!

    The second question is about speaking. Sam, form Suzhou wrote, "Our school has a foreign teacher. But I'm shy and can't speak to her. What should I do?"

    When I visit China, lots of people in the street say, "Hello! How are you? Where are you from? Do you like China?" These are good questions to start a conversation. Many people are shy when they speak English, so before you begin, takes deep breath and smile! Smiling always helps.

    The third question is about vocabulary. Oliver, from Anhui wrote, "I want to remember all the new words. I write them down, but I forget them quickly. What should I do? Try to remember eight or ten words a day. Write them on pieces of paper and place them in your bedroom. Say the words when you see them, and change them every day. And when you're shopping, how about counting the English words, or saying the English names for everything you see?