When people reunite with their loved ones, it's usually all extremely happy moment. But what is their most common response to seeing them again? It may seem strange，but most of the time they break down in tears.

    Now a group of psychologists from Yale University say they have found the reason why, and that crying tears of joy may well be the body's way of keeping emotional balance. “They seem to take place when people are overtaken by strong positive emotions, and people who do this seem to recover better from those strong emotions,” Oriana Aragon, the lead researcher said.

    Aragon and her fellow psychologists looked at hundreds of participants' emotional responses to different things, including happy reunions and cute babies. Many participants said they would react in a negative or aggressive way to the positive things —— to cry at happy moments and want to pinch(捏)a cute baby's face or even tell them “I want to eat you up!” But then researchers found that these people were able to calm down from strong emotions more quickly.

    There are many other examples of times when people respond to a positive experience with a negative emotional reaction. At an exciting concert, fans scream at their idols(偶像). People who have just had a big lottery win are often in floods of tears. “These findings advance our understanding of how people express and control their emotions, which is importantly related to mental and physical health, the quality of relationships with others, and even how well people work together.” said Aragon．

    Disposing(处理) of waste has been a problem since humans started producing it. As more and more people choose to live close together in cities, the waste-disposal problem becomes increasingly difficult.

    During the eighteenth century, it was usual for several neighboring towns to get together to select a faraway spot as a dumpsite. Residents or trash haulers(垃圾托运者) would transport household rubbish, rotted wood, and old possessions to the site. Periodically(定期的) some of the trash was burned and the rest was buried. The unpleasant sights and smells caused no problem because nobody lived close by.

    Factories, mills, and other industrial sites also had waste to be disposed of. Those located on rivers often just dumped the unwanted remains into the water. Others built huge burners with chimneys to deal with the problem.

    Several facts make these choices unacceptable to modern society. The first problem is space. Dumps, which are now called landfills, are most needed in heavily populated areas. Such areas rarely have empty land suitable for this purpose. Property is either too expensive or too close to residential(住宅区的)neighborhoods. Long-distance trash hauling has been a common practice, but once farm areas are refusing to accept rubbish from elsewhere, cheap land within trucking distance of major city areas is almost nonexistent.

    Awareness of pollution dangers has resulted in more strict rules of waste disposal. Pollution of rivers, ground water, land and air is a price people can no longer pay to get rid of waste. The amount of waste, however, continues to grow.

    Recycling efforts have become commonplace, and many towns require their people to take part. Even the most efficient recycling programs, however, can hope to deal with only about 50 percent of a city's reusable waste.

    A long time ago people thought that the sun went round the earth. In some countries people even said that the sun was a god(神). They thought the god drove across the sky each day on a golden horse. Now we know the earth goes round the sun. It takes the earth a year to go a circle(圈) round the sun. Today men even know how far it is for the earth to go round the sun. They tell us that the earth travels over a thousand miles a minute on its journey round the sun.

    The sun is really a star. It is much bigger than the earth and it is very hot. Some people have been to the moon but we know that no one can ever go to the sun. It is far too hot for people to live anywhere near it. The sun is three hundred thousand times heavier than the earth and more than million times larger.

    Time zone:

    Eastern Standard Time (EST): GMT+l0 hours.

    There is no daylight saving time in Queensland.

    Legal drinking age:

    18 years and older. Always keep your ID with you to prove your age.

    Alcohol (酒) shops & hotels are the only places where alcohol can be bought.

    Dangers:

    Dial 000 from a fixed line or 112 from a mobile phone. Police, ambulance, fire.

    Electricity:

    240/250 volts AC 50Hz Universal outlets for 110 volts (shavers only) standard in hotels, apartments, motels.

    Telephones:

    Australian international code is 61.

    Road rules:

    Left hand side driving. There is a 50kmh speed limit in most living areas and on open highways 100-110 kmh, seat belts must be worn all the time. If you want to hire a car, take along your driver's license.

No smoking:

    Indoors: Indoor areas are no smoking.

    Poker Machines: Poker machine areas are no smoking.

    Outdoors: Non-enclosed eating and drinking areas are no smoking.

Swimming safety:

    ALWAYS SWIM BET WEEN THE RED AND YELLOW FLAGS and pay attention to the life guards' advice. Gold coast beaches are guarded by skilled life guards and volunteers at weekends.

    Years ago, I lived in a building in a large city. The next building was only a few feet away from mine. There was a woman who lived there, whom I had never met, yet I could see her seated by her window each afternoon, sewing or reading.

    After several months had gone by, I began to notice that her window was dirty. Everything was unclear through the dirty window. I would say to myself, “I wonder why that woman doesn't wash her window. It really looks terrible.”

    One bright morning I decided to clean my flat, including washing the window on the inside.Late in the afternoon when I finished the cleaning, I sat down by the window with a cup of coffee for a rest. What a surprise! Across the way, the woman sitting by her window was clearly visible. Her window was clean!

    Then it dawned on me. I had been criticizing her dirty window, but all the time I was watching hers through my own dirty window.That was quite an important lesson for me. How often had I looked at and criticized others through the dirty window of my heart, through my own shortcomings?

    Since then, whenever I wanted to judge someone, I asked myself first, “Am I looking at him through my own dirty window?” I try to clean the window of my own world so that I may see the world about me more clearly.

    Balancing work and school is not an easy task for me. My first term in college has come and gone and I've had to balance a job there, too. I want to cut one loose. Honestly, many times I thought I wanted to drop out of school and just do my job because I needed the money. For a long while I made myself believe that school was getting in the way of my job and money. Not only was I trying to do work and school, but also I was trying to have a social life. Many times I thought that there were not enough hours in the day but I wasn't managing my time right. Hanging out with friends may have been wonderful but it wasn't putting money in my pocket or knowledge in my brain. Friends would have to wait. I was back on the see-saw (跷跷板) of balancing work and school.

    Scheduling and planning became the key to my success. Setting deadlines and meeting them were important to my college experience. Planning was going well and I felt ready to try and throw a social life back there. I tried to make plans with friends that didn't conflict with my deadlines. That was actually harder than I thought. So once again my social life had to be put on hold (搁置). My friends were very understanding and encouraged me to do my work. The extra motivation really proved helpful in the end. Some friends would joke that I was all work and no play but sometimes that's what has to happen to get work done.

    As the last term came to an end I can say I learned a lot about college life. Planning is necessary for organization. Drawing up a list of all things I had to do at the beginning of the week and actually completing them made me feel good. Not only have I learned something new about organization, but also I acquired a new tool that I can take everywhere with me and use effectively.