Technology is developing fast and it has become an important part of our life. Then what will the world be like in the future?

3-D food will be both delicious and nutritious. We can use 3-D printers to print some basic materials. ① And we can go further. Scientists belive that we just need to turn on a printer in the kitchen and then we can enjoy our favourite food whenever we like.

② 5G network will allow many more people to get information. Big companies like China Mobile and China Unicom will start to offer SG. It is said that promises download speeds 10 to 20 times faster than 4G. For example, we can download a film within just 1 second. But with a 4G network, it takes a few minutes. There will be much bandwidth (带宽) and we can get unlimited information.

Underwater cities will provide more space. The earth is becoming more and more crowded. We may turn to underwater homes, which will be built as low as 15 of the sea can be used to provide power for the homes.

③ For us common people on the earth, the dream of travelling around space will come true. In the coming years, spacecraft will be as popular as buses, trains and planes. We can leave our home and enter space to take an adventure. And even we will get used to living there.

A robot will be a part of life. Robots can do many of the same things as we humans do like driving cars. But they will be used in other areas as well. They will be able to think. They can tell the difference between right and wrong. They can feel. ④ In a word, just as Jules Verne said, "Anything one man can imagine, other men can make real."

It’s a hot summer afternoon in St Louis and Dawn Weber’s yard is filled with life. A catbird flies over groups of bees as Dragonflies skip across a pond. At just over a quarter of an acre, the carpet of native plants around Ms. Weber’s house is home to about 38 species of insects and 99 species of birds. “I really enjoy seeing the life,” she says. “There’re about 300 species of plants in the yard.”

Ms. Weber is among the growing number of homeowners who have traded manicured lawns(修整的草坪) for native and wildlife garden. The trend follows growing awareness of the need for species conservation in local ecosystems.

“The plants and animals around us run the ecosystem,” says Doug Tallamy, professor at the University of Delaware. But he adds, “We’re losing our insects, and were losing our plants and losing our birds. This is a disaster. And it stems from the fact that we’ve taken away the native plants or used incorrect plants. Not all plants support the insects that run the food web s that feed the birds and everything else. This breakdown of the food web has led to what environmental experts call a mass extinction event.”

But conservation experts think anyone with a yard can be part of the solution. America has more than 40 million acres of land used as lawns. Although green lawns may look pleasing. Professor Tallamy calls them “dead scape” land that does not support biodiversity or the local ecosystem.

Native gardens of any size in residential (住宅的) areas form “conservation passages” that support local wildlife. Local insects depend on these conservation passages and in turn support creatures higher on the food chain. If you add all of the residential landscape, it’s far more than the national park systems combined. If enough people could devote part of their landscape to the native plants that have developed with the insects in their ecosystem, we could reduce the impact and maybe even stop the ma ss extinction.

With the coming of online book buying, many have predicted that the book-stores will disappear eventually. To the book lovers, nothing beats walking through a bookshop, looking at all the covers, picking up large heavy books and turning them over. The smell of ink on paper, and conversations with strangers about authors are amazing for them. And we’re grateful that there’re beautiful bookstores still out there.

El Ateneo Grand Splendid

Designed for the music director Max Glucksmann, this building was opened as a show-stopping theater called Teatro Gran Splendid in Buenos Aires in 1919. After nearly a century of hosting tango (探戈舞) masters, the great space was rented by a firm, Grupo Ilhsa, in 2000. The former theater now serves as the group’s flagship bookstore; more than 1 million people visit it annually.

The Book Barge

The Book Barge is a 60-foot canal boat bookshop. Inspired by the Slow Food movement, Henshaw says, “We hope to promote a less hurried and busy lifestyle filled with leisure and pleasure here, through cups of tea, conversations, culture and of course, an extremely good Book Barge purchase.”

La Caverne aux Livres

At La Caverne aux Livres in north of Paris, an old postal train station and several mail-sorting train cars have become home to a ranging collection of used books for sale. Visitors often spend hours looking through the broad selection there, surrounded by an atmosphere of old letters and dreams of faraway places.

Selexyz Dominicanen

For those who regard bookstores with great respect, welcome to Swlexyz Dominicanen: a 13^th-century Dominican church in Maastricht, Holland. Later, the big space of the church was used to store bicycles. Several years ago, the church was changed to a bookstore. This glorious (哥特式的) building was redecorated by a design firm; the result is nothing short of a miracle.