Machu Picchu is an unusual site in Peru and one of the most mysterious wonders of the world. Built at almost 10,000 feet on the top of an Andean mountain, the Incas built hundreds of structures made of stone. A large number of Machu Picchu's surrounding structures date back to the early 13th century, but it was considered a chief sacred site far before then. The Inca people changed the large site into a very small but wonderful city, completely self-sufficient and hidden from below. Agricultural terraces (梯田) surrounded the entire city, fed by natural spring water, supporting the entire population.

Inca Trail

    The trail is one of the most famous in the world and regarded as one of the best. It covers only 26 miles, combining cloud forest, green mountain scenery, forest, and plenty of tunnels, paving stones, and ruins. The four-day hike begins slowly but quickly changes into a difficult journey suitable for those in excellent shape. The trail winds through the Andes, leading alongside and through ruins. Though independent hiking was once permitted, now it must be done with a guide.

Funerary Rock

    It is believed that the Funerary Rock at Machu Picchu was used as a place to prepare Inca nobles for preservation, or mummifying (做成木乃伊), a common habit among the tribe. Nobles would be laid out to be mummified by the hot sun and freezing cold nights after their organs were removed. The rock is also famous as a spot from which a view of the city is afforded.

Temple of the Sun

    Within the city's castle, deep within Machu Picchu, is the Temple of the Sun, accessed only by the Emperor and

    Inca priests. It means the Inca's advanced knowledge of religion, weather, and nature, showing the great extent

    Incas went to adapt to and learn about nature. Still unbroken, the temple was built to honor the god Inti, who is exactly the sun. The temple was effectively protected. It was also a very important scientific center, built in half-moon shape with openings facing north and east. The windows' shadows in the center of the temple helped see the start of winter solstice (至日), showing farming season.

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Public Speaking Training

·Get a coach

    {#blank#}1{#/blank#}，so get help. Since there are about a billion companies out there all ready to offer you public speaking training and courses, here are some things to look for when deciding the training that's right for you.

·Focus on positives

    Any training you do to become more effective at public speaking should always focus on the positive aspects of what you already do well. Nothing can hurt confidence more than being told that you aren't doing well. {#blank#}2{#/blank#}, so good public speaking training should develop those instead of telling you what you shouldn't do.

·{#blank#}3{#/blank#}    If you find a public speaking course that looks as though it's going to give you lots of dos and don'ts, walk away! Your brain is so full of what you're going to be talking about.

    {#blank#}4{#/blank#} As far as we're concerned, there are basically no hard and fast rules about public speaking. Your audience can be your friends.

·You are a special person not a clone

    Most importantly, good public speaking training should treat you as a special one, with your own personal habits. {#blank#}5{#/blank#} Your training course should help you bring out your personality, not try to turn you into someone you're not.

A. You aren't like anybody else

B. You already do lots of things well

C. Turn your back on too many rules

D. Check the rules about dos and don'ts

E. Whatever the presentation, public speaking is tough

F.The one thing you don't want is for them to fall asleep

G. So trying to force a whole set of rules into it will just make things worse

    Canada is one of the few nations in the world to have two official languages：English and French. There are 10 provinces in the country but only one of these—Quebec is known as "French Canada". This is because it was founded by French explorers while British adventurers discovered the rest.

    Canada left the Britain in 1867 to become an independent country, and English and French have been recognized as the official languages ever since.

    Most people speak English as their first language and the two national television networks broadcast in English throughout the country. Apart from in Quebec and a few places on the east coast, French television is very rare.

    The same goes for traffic signs and menus, for example. Outside of Quebec, there are only a few places where you'll see traffic signs in French. In restaurants, it's almost impossible to find French on the menu unless you are in the heartland of French Canada. However, all products sold in Canada must, by law, have labels（标签）and instructions in both languages.

    In Canada's English speaking provinces, official bilingualism（双语）means that students can choose to complete a special French language course. Under this programme, they are taught most of their subjects in French. If a student begins the course in kindergarten（幼儿园）or Grade One, it is likely that all their lessons will be in French. However, if they start at junior high school, 25 per cent of the teaching will continue to be in English.

    A six-wheeled robot travels underground in Hefei to discover warning signs of faults inside the pipeline network, "It looks like a toy car at first, but it's much more complicated than that," said Xu Mao, the robot's operator.

    The pipeline robot, developed by Wuhan Easy-Sight Technology, is made up of four parts — crawler, camera, cable reel, and controller. A full charge can enable the robot to work for four to five hours, covering a distance between 800 and 1,000 meters in the underground p ipeline.

    The robot made its appearance last month in Shushan District. It will carry out inspections of the underground pipeline network stretching 150 kilometers." Whether the pipe is leaking, damaged or blocked, we can clearly see its situation through high-definition(高清晰度的)cameras fixed into the robot, " said Qi Chuanshuai from the provincial construction engineering and testing institute.

    The real-time data including video images of the pipe will be up loaded and displayed on a computer. "If we find any problems, we stop the robot and record the flaws," Xu said. "We report the faults to local government, who will arrange the repair as soon as possible."

    With the rapid develop merit of cities, it is becoming increasingly difficult to manage underground pipelines. Among all the difficulties, discovering faults in the sewage (污水)and rainwater pipelines comes first. Many other cities such as Wuhan, Nanjing, Shenzhen, and Shanghai are using the robots to inspect their pipelines, the robot's developer said.

    Equipped with environmental detection sensors, the robots can monitor temperature and damp, poisonous gases, oxygen levels and smoke density, while providing color diagram in real time. "Compared with human workers, robots are able to enter smaller pipes and are immune (有免疫力的)to poisonous gases in sewage pipes," said Ge Shengli from Shushan District' s city management company." No digging is required and there is no need to interrupt traffic," Ge added.

    Most of us feel very tired after working for eight hours a day, five days a week. When we get home, we watch at least one film because it's well-deserved and the only time we get to "relax" before going to sleep. Wake up and repeat. No wonder you feel tired. So how do you get out of this vicious circle? How do you restart your life?

    ⒈YOUR MINDSET

    "Oh man, another one of these self-improvement things. I hope I can do it, but I've tried these things before, and I just never stick to it."

    This was something I used to say to myself every time I try to start something new for myself. There's a fear-driven side of your brain which tells you, "You can't do this."

    What can you do? Well, the tip here is to talk to yourself like you're talking to a friend, or a coworker. So the next time you try something new, be kind to yourself like you would be kind to others. You are your own worst critic. But you can also be your firm defender.

    ⒉YOUR DIET

    If you are looking at what you eat for the reason to feel energized, then the general rules are:

    1) Eat when you're hungry. Don't eat when you're not.

    2) Be mindful when you eat. Chew at least 20 times. Let yourself taste and digest your food.

    3) Don't do three things at once when you're eating. Your body wasn't made for that.

    4) Preferably, eat "real" food. Eat what your great-grandmother would recognize as food.

    Don't let your days pass by in a boring way. Start by re-examining these key habits in your life to build a body that can start doing things you want.

    ⒊YOUR SLEEP

    Without enough sleep, we're basically going through the day drunk. This means tiredness, difficulty to respond quickly and smartly to anything that comes up. The sleeping hours needed for an average adult ranges from 7 to 9 hours.

    What exactly is intelligence? There aren't any easy answers. Despite the progress that has been made in genetics and psychology, human intelligence has remained one of the most controversial areas of modern science, until now, that is, for the discovery of a gene(基因) linked to intelligence has made the experts think again.

    Robert Plomin of the Institute of Psychiatry in London and his colleagues in the US have been looking into genetic make-up. From their research, they have discovered that a slightly different gene is more common in those with a high IQ. Plomin analyzed DNA from two groups of 51 children aged between 6 and 15. What he found was that the first group had an IQ of 136, putting them in the top 5% of the population, while the other group had an average IQ of 103. An analysis of their genes showed that 32% of children in the higher group had the gene in question, while only 16% in the second group did. However, there is a lot more research to be done, and Plomin himself is cautious at this early stage. He suggests that there are probably many genes that contribute to intelligence, rather than just one.

    Several studies have shown a strong link between IQ and career success, although some psychologists remain unconvinced about this. Professor Michael Rowe, who has written a book called Genius Explained, is one of these. "The people with the highest IQs are not usually the ones who do best in their careers."

    Many psychologists now believe that when it comes to intelligence, IQ isn't everything. Many alternative views have been put forward recently. One example is the idea of multiple intelligences, which was developed in the 1980s by Harvard psychologist Howard Gardner. This offers a much broader view than the IQ theory, including creativity and communication skills as relevant factors(因素) in intelligence.

    Tony Buzan, brain expert and author of Master your Memory, is enthusiastic about this belief, arguing that true geniuses(天才) do indeed appear to combine high levels of each type of intelligence. He lists Alexander the Great, Pablo Picasso and Albert Einstein as examples. At the same time, Buzan believes that everyone can develop their intelligence, only if they take the trouble to exercise their brain. Perhaps there's hope for us all!