Facebook is an Internet-based social network site that lets people get in touch with family and friends and reach out to people with common interests around the world, all through computer. It is very popular, with more than 900 million users. If Facebook were a country, it would have about three times the population of the United States.

    Documents filed with US. financial regulators say Facebook has hundreds of millions of active users who send billions of messages each day and upload 250 million photographs on their personal pages. Facebook users have registered 100 billion “friends.”

    On Facebook, “Friending” someone means you add the person to your list of people you can communicate with directly, which often allows the person to see more information about you than you share with the general public.

    Facebook was started by Mark Zuckerberg and other students at Harvard University in 2004, and has grown at an amazingly fast pace.

    Facebook makes money when advertisers pay to get access to hundreds of millions of Facebook users. Advertisers can often direct their messages to the people most interested in their products because Facebook computers keep track of information that users place on their pages. For example, a person interested in diving, planning a wedding, looking for work, or suffering from diabetes(糖尿病) may see advertisements related to those topics.

    Facebook has become so much a part of the culture of the United States and other nations that it has been the subject of a Hollywood movie. It is a key marketing tool for many businesses, and its users' content has been used as evidence in some divorce or criminal cases.

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    Happy,angry,amazed—these are some of the emotions we like to express these days when we're sending a message on our smartphones.That's a quick way of telling someone how we're feeling.Yes,emojis have become a vital tool for communication.

    The emoji was first invented in Japan in the late 1990s and the word "emoji" comes from the Japanese words for "picture" and "character".The number of different images has dramatically increased since then and now we have a picture for every mood or situation.

    So now we are giving this new creation the visual "thumbs-up" but have you thought why we've become so addicted to using emojis? Professor Vyv Evans has written a book called The Emoji Code, saying "increasingly, what we're finding is that digital communication is taking over certain aspects of face-to-face interaction...one of the reasons why emojis are so popular is that they really do enable us to express our emotional selves more effectively."

    Another advantage of emojis is that they are an international language—they don't use words but some pictures so they can be easily interpreted whatever your native language is. However, the emojis can sometimes be misinterpreted—if a friend sends you an emoji of a hammer, you may think he/she is angry when really he/she is saying he/she is clumsy!

    Emojis are a good way for showing similar feelings. But as linguist(语言学家) Neil Cohn says, "To many, emojis are an exciting evolution of the way we communicate, but to others, they are a linguistic Armageddon（大决战）."It does show there is a lot more to our communication than words alone but does this mean the decline in traditional writing?

    More and more people like bicycling and it is no surprise. It's fun, healthy and good for the environment. Maybe that's why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today. Bikes can take you almost anywhere, and there is no oil cost!

    If you get on a bicycle and ride it, you may discover something new all around you. Stopping and getting off a bike is easier than stopping and getting out of your cars. You can bike to work and benefit from the enjoyable exercise without polluting the environment. You don't even have to ride all the way.

    Folding bikes work well for people who ride the train. Just fold the bike and take it with you. You can do the same on an airplane. A folding bike can be packed in a suitcase. You can also take a common bike with you when you fly. But be sure to look for information by getting on airline websites. Not all airlines are bicycle friendly to travellers.

    Here are some of Health Benefits of Bicycling：

    Bicycling helps to prevent heart diseases.

    Bicycling helps to control your weight.

    A 15­minute bike ride to and from work three times a week burns off five kilos of fat in a year.

    Bicycling can improve your mood.

    Exercise like bicycling has been shown to make people feel better, more relaxed and self-confident.

    Bicycling is healthier than driving.

    People need to relax and enjoy themselves. One way they can have a good time is to watch a baseball game or another sports event. Even thousands of years ago, groups of people gathered to watch skilled athletes (运动员).

    Over 2000 years ago in Greece, certain days in the year were festival days. These were holidays when people stopped work and enjoyed themselves. They liked to watch athletes take part in races and other games of skill.

The most important festival was held every four years at the town of Olympia. It was held in honor of the Greek god Zeus (宙斯). For five days, athletes from all parts of the Greek world took part in the Olympic Games. At the Olympic Games, people could watch them box, run, jump and so on. There was a relay race between two teams of men in which a lighted torch (火矩) was passed from runner to runner. The Olympic Games were thought to be so important that cities which were at war with one another had to stop fighting. People were allowed to travel to the games safely. Thousands of people came to Olympia from cities in Greece and from her colonies (殖民地) in Africa, Asia and Italy. They met as friends to cheer their favorite athletes and to enjoy themselves.

Feeling achy and feverish? Your misery has plenty of company. By the end of December, the tally(记录) of flu-like illnesses in the state exceeded the peaks in the two previous seasons, when the biggest number of cases occurred in February and March. This time, the flu virus seems to be hitting even harder.

Flu is unique among human diseases. It circulates constantly in cool and dry areas. Because it spreads from person to person and can be picked up easily, nearly everyone is exposed. While it's unclear whether the annual flu epidemic(流行病) will worsen this year, or just arrived earlier, fears have been increased by the severity of flu in Australia during its most recent season and the fact that the vaccine may protect against the predominant(盛行的) kind of the flu only 30 percent of the time.

Despite the worries, doctors and public health officials say there is no evidence that people are getting sicker than usual. Flu cases in Massachusetts started rising around Thanksgiving and increased steadily, with an especially steep climb in the last week of the year. "This is a bad flu season but not a horrible one," said Dr Andrew G. Villanueva, a lung specialist and chief quality officer at the Lahey Hospital & Medical Centre in Burlington.

"The flu season, while clearly in full swing, doesn't ‘feel different' from previous years," Villanueva said. "We're not seeing a lot of people being hospitalised because of flu," he said. "Most people with the flu recover on their own without medical care." 

By clicking the thumbs up, posting a comment, or sharing a post, people are validating(认可) each other at an increasing rate. This, as well as the need for in-person validation, can create anxiety, depression, and low self-esteem and make it addictive to hear praise, acceptance, and acknowledgment in all aspects of life.

To break free from external validation, it's key to learn to be aware when you are seeking it.{#blank#}1{#/blank#} Here are some meaningful steps to begin that journey.

{#blank#}2{#/blank#}Getting off social media is a great place to start. This reduces the comparison to others or the anxiety and stress about how your picture, post, or comment is being seen and received by others.

Be mindful. Look carefully at what you are doing.{#blank#}3{#/blank#}These are self-validations that help you build up your acknowledgment of your own abilities, talents, and skills.

Do not ask for validation. {#blank#}4{#/blank#} If you do receive validation (encouragement or acknowledgment) recognize the praise and acknowledge it, then stop. Do not continue to ask others or seek out others for validation.

Keep in mind that validation is not a bad thing in your life; it is positive without doubt. {#blank#}5{#/blank#}