Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing or whistle when you are happy.

    Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.

    Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims（声称）as its own. Only he and his family are welcome there. No other families of the same species are welcome. Your yard and house are your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. Probably this would be enough to frighten him away.

    If so, you have actually scared the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting（筑巢）season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird's song, and it is usually enough to keep an outsider away.

    Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs.

    You can see that birds have a language of their own. Most of it has to do with attracting mates and setting up territories.

    Chinese people are, quite rightly, proud of their food. However, when foreigners like Britons and Americans think of Chinese food, their impression of it is different to what you might think.

    Growing up in the UK, the Chinese food I was used to eating was food I now recognize as being from Guangdong. For example, a typical dish I would order would be pork in sweet and sour sauce, probably with some rice and spring rolls on the side. This is the type of food we generally eat because most Chinese immigrants(移民) to the UK have come from Guangdong. You can tell, because when most British people try to copy the sound of Chinese, they actually copy the sound of Guangdong people—hearing the real Putonghua is sometimes a shock to British people who have grown up thinking it sounds completely different!

    British attitudes to Chinese food may be changing, though. Chinese-American chef Ken Hom has been on British TV for 30 years, and he told BBC Food: "Chinese food at the beginning of the 80s (in the UK) was sweet and sour pork, mainly. Most Brits had the unchangeable view of Chinese food… Now you are seeing more local Chinese food from Sichuan, Hunan and other areas of China. It is no longer just Guangdong food." Similarly, to most Americans, Chinese food doesn't go too far past orange chicken and fortune cookies, but more Chinese local dishes are becoming successful, especially in big cities like New York.

    Attitudes have not quite changed completely, though. Many foreigners who live in China will be familiar with this question from a relative back at home: "Have they given you dog yet?" Yes, perhaps because people still know too little about Chinese culture, many people believe that Chinese people love to eat dog meat. And of course, some people do eat dogs, which to Americans is like "eating a member of one's family" according to Vision Times. Also, Chinese people eat many other things people in the West do not—chicken claws, duck heads and some animals' organs.

    But what do foreigners think when they come to China and taste real Chinese food? You'll be glad to know that in my experience, the impressions have been very good.

    We offer some kinds of courses. Each course has been designed to help students according to their needs.

    Course 1: High School ESL

    Why not make the most of your time studying in Australia with the help from TIES? We have High School ESL classes each week specifically designed for international students. Tuesday to Friday: 10:00 am to 12:00 am, $25 per hour.

    Course 2: One on One

    If you are interested in some One on One lessons with TIES teachers, we can design a course to meet your needs. One on One lessons can improve your English language skills more quickly and help students who want to take TOEFL. Tuesday to Friday: 2:00 pm to 5:00 pm, $ 80 per hour.

    Course 3: General English

    General English is designed to develop students' basic communication skills in speaking and pronunciation, reading, listening, writing, grammar and vocabulary. Tuesday to Friday: 9:00 am to 11:00 am, $ 288 per week.

    Course 4: Night Classes

    Do you want to improve your English and get the best possible results in your GRE test? We have two night classes each week designed to meet your needs. Tuesday and Thursday evenings: 8:30 pm to 10:30 pm, $60 per day.

    One of the first things that Jim discovered while living with the Greens was that there were different television channels(频道)in Britain, the BBC broadcasts on two channels: BBC1 and BBC2. There is a mixture of serious and light programmes on BBC1; there are mainly serious programmes on BBC2. ITV is an independent(独立的)channel which carries advertisements(广告). There are no advertisements on the BBC, so everyone must pay some money to the BBC each year. There are both serious and light programmes on ITV. Because of the different channels, it is not surprising that you often see each member in Mg. Green's house wants to choose his or her own favorite channel. This is the sort of thing you hear:

    "There's sports programme on ITV."

    "What's that, children?"

    "We were wondering if we could watch the sports programme on ITV."

    "But I was wondering whether to watch the other programme on BBC1." And so on. The children like ITV; mother prefers BBC1; father prefers BBC2. Jim hasn't made up his mind.

    The British Museum is a museum dedicated to human history, art and culture, located in the Bloomsbury area of London. Its permanent collection, numbering some 8 million works, is among the largest and most comprehensive in existence and originates from all continents, illustrating and documenting the story of human culture from its beginnings to the present.

    The British Museum was established in 1753, largely based on the collections of the physician and scientist Sir Hans Sloane. The museum first opened to the public on 15 January 1759 in Montagu House in Bloomsbury, on the site of the current museum building.

    Admission and opening times

    Free, open daily 10: 00—17: 30.

    The Museum is open every day except for 24, 25 and 26 December and 1 January.

    Museum galleries are open daily 10: 00—17: 30, and most are open until 20: 30 on Fridays.

    Closing starts from 17: 20 (20: 20 on Fridays).

    Tips for your school visit

    It's a good idea to come and see the Museum before your visit. Whatever your plans, please book in advance via the Ticket Desk to make sure you get the most out of your trip.

    Booking your visit

    Contact the Ticket Desk at ＋44(0)20 7323 8181 or tickets @ britishmuseum.org

    Cancellation

    If you are not able to attend a session you must inform the Ticket Desk at least three weeks before the session date. Failure to do so may incur a charge.

    Gallery availability

    Please book at least one term in advance and wait for confirmation before making travel plans. Greek and Egyptian galleries book up quickly. Opening times of some galleries may be limited at short notice—you will be contacted if necessary.

    Access and special educational needs

    The majority of galleries and all special exhibitions are fully accessible. There is a range of facilities for visual, hearing and mobility impaired students.

    Parking

    There is little on-street parking available. The nearest car park to the Museum is located at Bloomsbury Square, WC1A 2RJ. There is limited parking in the Museum's forecourt for disabled visitors only. To make arrangements please telephone＋44 (0)20 7323 8299 at least 24 hours in advance. You will be asked to provide the registration number, make and model of your vehicle and the date of your visit.

    Support us

    Your support is vital in enabling the Museum to fulfill its mission to share its collection with the world. The British Museum relies on funding from a wide range of sources and there are many ways that you can donate to help ensure the display, care and preservation of the collection for future generations.

    Please consider supporting the British Museum today.

    The secret to living longer could be as simple as picking up your walking pace, according to a new study. Researchers from the University of Sydney found that walking at a brisk (快的) or fast pace was associated with a risk reduction of 24 percent for any cause of death.

    This effect was even more obvious in older age group, with fast walkers over the age of 60 reducing their risk of death by a surprising 53 percent. Professor Emmanuel Stamatakis, who led the study, explained, "A fast pace is generally five to six kilometers per hour, but it really depends on a walker's fitness levels; an alternatives indicator is to walk at a pace that makes you slightly out of breath or sweaty."

    In the study, the researchers looked at the results of 11 surveys from 1994 to 2008, in which participants recorded their walking pace, as well as age, sex and BMI. The analysis showed that walking at an average pace was associated with a 20 percent risk reduction for all-cause mortality (死亡率) compared with walking at a slow pace, while walking at a brisk or fast pace was associated with a risk reduction of 24 percent.

    The researchers hope the findings will encourage the development of public health message about the benefits of walking pace. Professor Stamatakis added, "These analyses suggest that increasing walking pace may be a straightforward way for people to improve heart health and risk for premature mortality—providing a simple message for public health campaigns to promote.

    "Especially in situations when walking more isn't possible due to time pressures or a less walking-friendly environment, walking faster may be a good option to get the heart rate up—one that most people can easily add to their lives."