1 . A skywell, or "tian jing", is a typical feature of a traditional home in China. ________ a northern Chinese courtyard, or “yuan zi”a skywell is smaller and less exposed to the outdoor environment. They are________ seen in homes dating to Ming and Qing dynasties, which were designed to________different generations of relatives.

Although a skywell's size and design vary from region to region, it is always rectangular and located in the Core of a house, either________by rooms on four sides or three sides plus a wall. Skywells were designed to cool buildings before air-conditioning existed. When wind blows above a skywell house, it can enter the indoor space through the opening. Because outdoor air is often cooler than indoor air, the ________breeze travels down the walls to the lower storeys and create air ________ by replacing warmer indoor air,   which rises and leaves through the opening.

The main purpose of a skywell is to allow in light, improve ventilation (通风) and ________ rainwater. In Huizhou, a skywell is small but tall, and the rooms around it can ________ sunlight on hot days, enabling the bottom of the skywell to stay cool. ________ hot air inside the house can rise and escape through the opening above the skywell, which“works just like a ________”

As a(n) ________ space between indoor life and the outdoor environment, a skywell acts as an effective heat buffer(缓冲)to shield residents from the hot air outside. But the largest part of skywell's cooling effect actually comes when there are bodies of water in the enclosure.

Evaporated water cools hot air, a process known as evaporative cooling which is ________ in Huizhou skywells. In the past, Huizhou families collected rainwater in their skywells because they believed this could safeguard and boost their wealth. Skywells therefore have channels around them to ________ rainwater coming from the roofs.

Though existing in China for hundreds of years, in recent times they have often been forgotten by people who prefer modern________. Over the past two decades, however, due to a ________ of traditional Chinese architecture, skywell buildings have been making a comeback.

In today’s lecture we will center on the people who lived five thousand years ago in the Sahara Desert. Most of these desert people moved across the countryside throughout the year. But if the journey was long, extra food and tools were sometimes stored in caves. One of these caves is now an exciting historic site. Even though the cave is very large, it was certainly too dark and dusty for people to live in, but it was a great place to hide things. And huge amounts of food supplies and daily tools have been found there. The food includes dried fish and nuts. Some decorations were also found in the caves. There are necklaces, earrings, and so on. Most of them are made of bone. From the above talk, we can see that there are really a lot of differences between ancient people’s lives and our lives today.

Welcomes all school groups to explore technology and the natural environment on a field trip designed to meet the learning needs of the students.

You can visit the museum from Monday to Saturday from 9:00 a.m. to 5:00 p.m. Groups must have at least one teacher for every ten students. Students must be supervised at all times, and teachers are responsible for their behavior inside the museum. Unsafe behavior is not permitted and will result in the entire group being asked to leave.

No backpacks, headphones, candy, gum, or lunches are allowed inside the museum. Lunches may be eaten outside in the park. We regret that the museum is unable to provide a place to have lunch indoors. In the event of bad weather, please plan to eat in your vehicle.

4 . During the summer holidays, you might be eager to get out and about. What would you like to do? There are plenty of helpful websites and apps with good ideas.

The Wildlife Trusts charity has a map of walks all over the UK. You can zoom in to find the ones nearest where you live, read about them and plan a visit. Another good website for finding places to walk is AllTrails, where you can search for the name of a nearby city or park to explore with your family or friends.

One fun way to explore your neighborhood is through wildlife. The Week Junior Science+Nature’s summer scavenger hunt (寻宝游戏) asks you to track down 10 natural objects, including clouds and creepy-crawlies. There’s also a photo competition for young nature lovers.

Summer is the best time for butterfly-spotting, and iRecord Butterflies is a free app that helps you to identify the ones you see. It also uses the data to protect these beautiful creatures.

Another cool app worth checking is Seek by iNaturalist, which includes information about all sorts of wildlife, including bugs, fish and plants. And you can take part in monthly challenges. It’s been designed for families to use.

Finally, there’s Parkrun, where adults and young people get together to run in thousands of local parks. The Junior Parkrun website has a map showing you when and where these events take place, to help find your nearest one.

5 . Many of the world’s most famous landmarks now offer virtual tours, meaning people can visit museums, world heritage sites and other attractions from the comfort of the sofa. Such virtual travel experiences, as some experts have considered as an eco-friendly solution to the problem of overtourism, are seeing an increase in popularity. For overcrowded destinations, virtual reality experiences can help divert (使改道) some tourists, easing the burden on the location’s infrastructure (基础设施).

However, there’s a big gap between using virtual reality to “try before you buy” and treating virtual reality like the destination itself.

To start with, the technology isn’t ready yet. 360-degree virtual reality videos are usually experienced through a headset or an app. The headsets are expensive and heavy, and aren’t comfortable to wear for more than 30 minutes. The apps have none of these problems, but simply aren’t as impressive.

Limited physical feelings are another problem. The videos focus on sounds and sights but can’t do much with smell, touch, or taste, and VR experiences tend to only be a few minutes long—hardly equal to a two-week vacation in Spain. Some researchers are creating a full-body suit with enhanced sensory experiences, but it still doesn’t satisfy the deeper needs that make people travel.

What’s more, tourists on virtual tours see a world only to the extent that someone was able to film and construct it. In a virtual experience, visitors can’t choose to wander down a side street and discover a charming café—unless those options have already been programmed. It can definitely disappoint those who tend to be less directed in their explorations and more focused on new experiences and discoveries.

Virtual reality may never replace traditional travel, but it still offers possibilities. If the technology becomes advanced enough, those who are more environmentally conscious among us—especially those aiming to reduce our carbon footprint—might prefer this form of escape. Also, VR travel does bring parts of the world to people who are physically unable to visit certain landmarks.

6 . I wanted the pleasure of being in Africa again. Feeling that the place was so large that it contained many untold tales and some hope and comedy and sweetness too, I aimed to reinsert myself in the bundy, as we used to call the bush, and to wander around. There I had lived and worked, happily, almost forty years ago, in the heart of the greenest continent.

In those old undramatic days of my school teaching in the bundu, folks lived their lives on bush paths at the end of unpaved roads of red clay, in villages of grass-roofed huts. They had a new national flag, they had just gotten the vote, some had bikes, many talked about buying their first pair of shoes. They were hopeful, and, so was I, a schoolteacher living near a settlement of mud-huts among trees and fields—children shouting at play; and women bent double—most with infants on their backs—hoeing(锄地) the corn beans; and the men sitting in the shade.

The Swahili word safari means “journey”, it has nothing to do with animals, someone “on safari” is just away and unobtainable and out of touch. Out of touch in Africa was where I wanted to be. The wish to disappear sends many travellers away. If you are thoroughly sick of being kept waiting at home or at work, travel is perfect: let other people wait for a change. Travel is a sort of revenge(报复) for having been put on hold, or having to leave messages on answering machines, not knowing your party’s extension, being kept waiting all your working life. But also being kept waiting is the human condition.

Travel in the African bush can also be a sort of revenge on mobile phones and email, on telephones and the daily paper, on the aspects of globalization that allow anyone who chooses to get their hands on you. I desired to be unobtainable. I was going to Africa for the best of reasons—in a spirit of discovery—simply to disappear, to light out, with a suggestion of I dare you to try to find me.

Home had become a routine, and routine made time pass quickly. I was a sitting duck in this predictable routine: people knew when to call me, they knew when I would be at my desk. I was in such regular touch that it was like having a job, a mode of life I hated. I was sick of being called up and asked for favors, hit up for money. You stick around too long and people begin to impose their own deadlines on you.

9 . I was hungry because after a full day of exploring the German town, I hadn’t eaten anything more than a pizza. I’m comfortable travelling through a country where I don’t speak the language, but I would almost rather go hungry than sit in a restaurant eating alone.

After wandering around the town for another half an hour, I finally chose an Italian restaurant that seemed friendly enough. I know I should have gone for more traditional German food, but the idea of a plate of Italian noodles for only six euros was too much to pass up. So I nervously entered. As I stood there, I noticed all the happy families and friends eating together. The hostess found a small table for me next to the front entrance.

“Great,” I thought, “now people can look at this friendless traveller as they enter.” Then I started to wonder how many of the customers might mistake me for the hostess and how much this would interrupt(打断) my meal. Then a woman, whose name is now lost to memory, invited me to have dinner with her and her family. I couldn’t believe it! This was the German friendliness I had read about.

I walked to their table. I can be quite shy when talking to new people. I also started to wonder how this would work. Do I have to talk to them the whole time? Do they even know English? The meal began awkwardly. The woman’s two children mostly stared at me.

Fortunately, the parents spoke enough English and I knew a little German. I came into this restaurant afraid of eating alone and I ended up conquering my shyness. Separate bills came for each of us; we paid and went our own ways. The family probably ended up discussing their day while I just walked back to my hotel with a smile on my face.

10 . We humans have always been obsessed with reaching higher, building taller, and touching the sky. In effect, we have been building towers and buildings each taller than the other. Today, we will look at four of the tallest buildings in the world.

Burj Khalifa

Since it opened on January 4, 2010, the Burj Khalifa has been the tallest building in the world. The United Arab Emirates broke world records in the 21st century for building a needle-like, 162 story skyscraper in Dubai. A public observation deck called “At the Top” is located on the 124th floor. The top floor is home to a private VIP club, closed to anyone except members.

Taipei 101

Featured in many videos, the tallest building in Taipei, China, is famous for its unique shape and awesome fireworks display every year. It houses lots of hotels, offices, apartments, and an observatory deck. There’s an outdoor round observatory square on the 91st floor of the building, at 392m above the ground, it’s now the third highest open-air observation deck in the world.

Shanghai World Financial Centre

The Shanghai World Financial Centre, is a soaring glass skyscraper with a distinctive opening at the top in Pudong District, Shanghai, China. The construction of this building began in 1997, but due to the crisis in Southeast Asia, it temporarily halted and resumed in 2003. Its final height is 492 metres and has 101 floors.

International Commerce Centre (ICC)

The ICC building, completed in 2010 in West Kowloon, is the tallest building in Hong Kong, China, and one of the world’s tallest skyscrapers at 484 metres. Original plans were for an even taller building, but zoning laws prohibited the construction of buildings higher than the surrounding mountains. The design of the skyscraper was revised (修改) and plans for a pyramidal-shaped top were abandoned.