The term “to extend an olive（橄榄） branch” means to make an offer of peace or reconciliation(和好). This term has Biblical（圣经的）origins, coming from the section of the Old Testament that deals with the flood; the sign that the flood is over is an olive branch brought back to the ark(方舟) by a dove. Olive branches were also symbols of peace in Ancient Greece and Rome, and they continue to be used in various works of art that are meant to suggest peace.

    Some people have suggested that the olive was a very deliberate and well-considered choice as a metaphor(比喻）for peace, because olive trees famously take years to mature. War is typically very hard on the trees because people cannot take the time to nurture them and plant new ones. Therefore, the offer of an olive branch would suggest that someone is tired of war, whether it is an actual war or a falling out between friends.

    In Ancient Greek and Roman times, people would offer actual olive branches. In Rome, for example, defeated armies traditionally carried olive branches to indicate that they were giving in, and the Greeks used them into weddings and other ceremonies. In the modern era, the branch is usually metaphorical, rather than actual, not least because the plants can be a bit difficult to obtain.

    Many people agree that peace negotiations at all levels of society are a good idea. Between nations, obviously, it is important to extend an olive branch to ensure mutual safety and to help the world run more smoothly. This act can also be important on a personal level, as resolving conflict and learning to get along with others is viewed as an important life skill in many cultures.

    At some point in their lives, many people will be advised to extend an olive branch to settle a dispute or resolve an issue. Some people believe that it takes an immense amount of courage to take this action, as it often comes with an admission of wrongdoing and regret.

    There is no doubt that to study abroad gives you an excellent opportunity to learn things which are very helpful in your career building. Today Canada has earned a good name in providing quality education and safe healthy environment for its students. That is why more than 130,000 international students enroll (登记入学) every year in famous Canadian universities. It is an ideal education destination and gives students a unique experience education and its versatile (多样的) arts and culture. Canada spends a lot on education and is ranked the highest in G-8 countries.

    To study in Canada is very cheap．These universities are affordable compared to other universities in the world such as in the US, New Zealand and UK where cost of education and living is very high．According to a survey in 2006, “Canada offered the lowest tuition fees (学费) for foreign students compared to UK and Australia.”

    The low rate of crimes and the peaceful safe environment of the country also attract a lot of international students to Canadian universities. Canada has 92 universities and 175 community colleges and university degrees have three levels—Bachelor's, Master's and Doctoral.

    A Bachelor's degree in Canada is for three or four years' full-time study depending on the nature of the program you are doing. On the other hand, a Master's degree consists of two years of study. For a Doctoral program in Canadian universities, you require a minimum (最低/小的) of three to four or sometimes five years of research and study.

    You can also find many diploma (文凭) and certification (认证) programs in Canadian universities where the time is generally one year．Some of the Canadian universities are well-regarded worldwide and the degree and diploma obtained from these Canadian universities are recognized globally and promise bright future. After the completion of studies, a person could also find great job offers in Canada itself. International students require a work permit to work on campus.

    In its early history, Chicago had floods frequently, especially in the spring, making the streets so muddy that people, horses, and carts got stuck. An old joke that was popular at the time went something like this: A man is stuck up to his waist in a muddy Chicago street. Asked if he needs help, he replies,“No, thanks. I've got a good horse under me.”

    The city planners decided to build an underground drainage(排水) system, but there simply wasn't enough difference between the height of the ground level and the water level. The only two options were to lower the Chicago River or raise the city.

    An engineer named Ellis Chesbrough convinced the city that it had no choice but to build the pipes above ground and then cover them with dirt. This raised the level of the city's streets by as much as 12 feet.

    This of course created a new problem: dirt practically buried the first floors of every building in Chicago. Building owners were faced with a choice: either change the first floors of their buildings into basements, and the second stories into main floors, or hoist the entire bulidings to meet the new street level. Small wood-frame buildings could be lifted fairly easily. But what about large, heavy structures like the Tremont Hotel, which was a six-story brick building?

    That's where George Pullman came in. He had developed some house-moving skills successfully. To lift a big structure like Tremont Hotel, Pullman would place thousands of jackscrews(螺旋千斤顶) beneath the building's foundation. One man was assigned to operate each section of roughly 10 jackscrews. At Pullman's signal each man turned his jackscrew the same amount at the same time, thereby raising the building slowly and evenly. Astonishingly, the Tremont Hotel stayed open during the entire operation, and many of its guests didn't even notice anything was happening.

    Some people like to say that every problem has a solution. But in Chicago's early history, every engineering solution seemed to create a new problem. Now that Chicago's waste water was draining efficiently into the Chicago River, the city's next step was to clean the polluted river.

    It is easier to float in the ocean than it is to float in a swimming pool.Do you know why?

    Ocean water is full of salt--and salt water can hold up more weight than fresh water.See for yourself!

You will Need:

3 cups of warm water

Measuring cup(量杯)

Wide-mouthed jar

Salt

Spoon

Raw(生的)potato

You Will Do:

⒈Pour 1.5cups of warm water into the jar.

⒉Add 1/3 cup of salt.

⒊Stir(搅拌) until the salt is completely dissolved.

⒋Add another 1.5 cups of water.Pour it slowly over the back of the spoon into the jar so that the two liquids will not mix together.

⒌Gently place the potato into the jar.Do not drop it.

    What Will Happen:

    The potato will sink--but only halfway!

    Why?

    Salt water is heavier than fresh water,so it will stay on the bottom.The fresh water will remain on top.

    The potato is heavier than the fresh water,but it is lighter than the salt water.That is why the potato will sink halfway down.

    Imagine this: You're at the movies seeing the latest box-office hit. The leading actor chases down the film's bad guy before winning over the beautiful leading lady. What does he do next? He sucks on a cigarette.

    What's wrong with this picture? Doesn't the beautiful woman see her hero's yellow teeth? Doesn't she smell his smoky breath? And wouldn't the good guy have trouble chasing, since smoking causes a person to cough?

    But you don't see any of that when someone smokes cigarettes in the movies. And there is a lot of smoking in movies. Actors light up in more than 50 percent of youth-rated (G, PG, PG-13) movies, according to the American Legacy Foundation, which aims to put an end to smoking among young people. That means that Hollywood is showing 14 billion images of smoking to young people every year.

    All that exposure to on-screen smoking can influence teens to smoke. The Center for Disease Control and Prevention (CDC) argues that 44 percent of teens who begin smoking do so because they've seen smoking in movies. The CDC reports that teens are two to three times more likely to start smoking after seeing repeated smoking scenes in movies than teens who are lightly exposed to smoking in movies.

    Several organizations are working to remove smoking in youth-rated movies. And adults are not the only ones who care about this issue. Many teens are actively involved. Livia Clandorf, 16, of Chatham, New York, is a member of Reality Check, an organization that educates teens about what it considers to be the manipulative(巧妙处理的) practices of tobacco companies. Livia participated in an event called a "movie stomp(跺脚)". Reality Check rents out a movie theater and screens a youth-rated film that shows smoking, they stomp their feet and show disapproval by shouting “boo”.

Whizzfizzing Festival

    One of the "Home Counties" to the north and west of London, Buckinghamshire is known for the rolling Chiltern Hills, its pretty villages, and the much-loved children's author Roald Dahl.

    The writer who penned Charlie and the Chocolate Factory, The Witches, Matilda and The Big Friendly Giant is the i9nspiration for the Whizzfizzing Festival – which will transform the market-town of Aylesbury into all kinds of music, colour and fun on Saturday, 1 July.

    Formerly known as The Roald Dahl Festival, this year's event will celebrate a broad range of children's films and bring to life some of its best-loved characters – from Alice in Wonderland and the Gruffala to The Big Friendly Giant and Harry Potter.

    Things to see and do

    The fun and festivals start at 11 a.m. with a colourful children's parade. More than 650 local school children and teachers, many in fancy dress, will march through the town carrying giant carnival puppets(木偶), with thousands of audiences lining the streets to watch.

    The parade will be followed with a range of child-friendly activities and workshops held in venues across the town.

    Don't be late for the Mad Hatters Tea Party in the Bucks County Museum, catch a splendid screening of a Roald Dahl movie in the Old Court House, and watch leading children's authors, including Julian Clary, give readings in the Market Square.

    CBeebies' children's chef Katy Ashworth will once again be cooking up a storm with her inter-active

    Concoction Kitchen, located outside Hale Leys Shopping Centre. Little chefs will have lots of opportunities to get involved with preparing, cooking – and best of all, tasting – Katy's fabulous recipes.

    With hands-on arts and crafts workshops, storytelling sessions, live music, a fancy dress competition, street theatre and more, there is something for everyone.

    For more information, visit: http://www.aylesburyvaledc.gov.uk/cylesbury-whizzfizzing- festival-inspired- roald-dahl