Hummingbirds (蜂鸟) are very small birds. This small bird is quite an acrobat (杂技演员). Only a few birds, such as kingfishers and sunbirds, can hover, which means to stay in one place in the air. But no other bird can match the flying skills of the hummingbird. The hummingbird can hover, fly backward and fly upside down!

    Hummingbirds got their name because their wings move very quickly when they fly. This causes a humming sound. Their wings move so fast that you can't see them at all. This takes a lot of energy. These little birds must have food about every 20 minutes to have enough strength to fly. Their favorite food is nectar (花蜜). Nectar is the sweet water deep inside a flower. Hummingbirds use their long, thin bills to drink from flowers. When a hummingbird drinks nectar, it hovers in front of a flower. It never touches the flower with its wings or feet.

    Of all the birds in the world, the hummingbird's colors are among the brightest. Some are bright green with red and white markings. Some are purple. One kind of hummingbird can change its color from reddish-brown to purple to red!

    The hummingbird's nest is special, too. It looks like a small cup. The inside of the nest is very soft. This is because one of the things the mother bird uses to build the nest is the silk from a spider's web (蜘蛛网).

    Phillip Island is a small island and nature reserve off the coast of South Australia, about 140 km from Melbourne. On the island you can see koalas, kangaroos and the main attraction, the Penguin Parade（归巢）on Summerland Beach.

    As dusk was approaching, we made our way down to the beach, as did everyone else. On the beach was a stone grandstand, rather cold on the behind, so bring a coat or blanket to sit on. As it got darker, people talked less, keeping an eye out on the beach to see the arrival of that first penguin.

    Suddenly there was movement at the edge of the surf and all heads turned as one. There, standing by the edge of the water was the smallest penguin we had ever seen. He looked left, then right, as if he was considering crossing a busy road and then he ran quickly across to the sand dunes and the penguin holes.

    He must have been the scout(侦查员), because after him, there came groups of penguins, some consisted of two or three penguins, and some had about ten or fifteen, but they all made the same mad dash across the sand into the holes, as if they couldn't get there fast enough. The groups started to lessen and finally no more penguins emerged from the sea.

    We sat on the grandstand for a while, not talking, just feeling awed(敬畏的) at what we'd just seen. Neither of us had ever seen penguins in the wild before, only in zoos and it was an amazing feeling.

    You could see the penguins here every evening and morning, but they weren't in cages or in small pools. The sea was their playground and it is a sight we would definitely recommend to anyone.

    You weren't allowed to take flash photographs as it scared them. After the penguins had gone to their holes, you could walk along boardwalks and see them there. That's got to be worth a look.

    In October, I told the eight-year-olds in the class I teach in Pompton Lakes, New Jersey, about my plan. "Since all of you have done extra jobs around the house to earn some money," I said. "Then we'll buy food for a Thanksgiving dinner for someone who might not have a nice dinner otherwise."

    I watched them while they walked up and down the supermarket. "Flowers!" Kristine cried. The group rushed toward the holiday plants.

    "You can't eat flowers."——It was more sensible(明智的) to use any extra money to buy something that could be transformed(转换，转变) into meals.

    "But Mrs. Sherlock," came the begging voice, "we want flowers."

    Defeated finally, I put a pot of "funny" purple(紫色的) mums in the cart full of foods. "She'll like this one," the children agreed.

    An organization had given us the name and address of a needy grandmother who had lived alone for many years. We finally pulled up in front of a small house. A slightly built woman with a weary face came to the door to welcome us.

    My little group ran to get the food. As each box was carried in, the old woman kept on saying "Thanks"—much to her visitors' pleasure. When Amy put the mums on the counter, the woman seemed surprised. She's wishing it was a bag of flour(面粉), I thought.

    We returned to the car. As we fastened our seat belts, we could see the kitchen window. The woman inside waved goodbye, then turned and walked across the room, past the turkey, past the goods, straight to the mums. She put her face in their petal. When she raised her head, there was a smile on her lips. She was transformed before our eyes.

    The children were quiet. At that moment, they had seen for themselves the power they possessed(拥有) to make another's life better. The children had sensed(感到) that sometimes a person needs a bunch of funny purple flowers on a dark November day.

    In the mid-1990s, Tom Bissell taught English as a volunteer in Uzbekistan. He left after seven months, physically broken and having lost his mind. A few years later, still attracted to the country, he returned to Uzbekistan to write an article about the disappearance of the Aral Sea.

    His visit, however, ended up involving a lot more than that. Hence this book, Chasing the Sea: Lost Among the Ghosts of Empire in Central Asia, which talks about a road trip from Tashkent to Karakalpakstan, where millions of lives have been destroyed by the slow drying up of the sea. It is the story of an American travelling to a strange land, and of the people he meets on his way: Rustam, his translator, a lovely 24-year-old who picked up his colorful English in California, Oleg and Natasha, his hosts in Tashkent, and a string of foreign aid workers.

    This is a quick look at life in Uzbekistan, made of friendliness and warmth, but also its darker side of society. In Samarkand, Mr Bissell admires the architectural wonders, while on his way to Bukhara he gets a taste of police methods when suspected of drug dealing. In Ferghana, he attends a mountain funeral(葬礼)followed by a strange drinking party. And in Karakalpakstan, he is saddened by the dust storms, diseases and fishing boats stuck miles from the sea.

    Mr Bissell skillfully organizes historical insights and cultural references, making his tale a well-rounded picture of Uzbekistan, seen from Western eyes. His judgment and references are decidedly American, as well as his delicate stomach. As the author explains, this is neither a travel nor a history book, or even a piece of reportage. Whatever it is, the result is a fine and vivid description of the purest of Central Asian traditions.

One of the tallest wooden buildings in Europe, a 98m timber mixture skyscraper, is to rise in Berlin.

The 29-storey WoHo Tower, to be designed by a firm of Norwegian architects, is intended to be a "light-house project" for low-carbon construction, towering over Potsdamer Platz and the Landwehr Canal.

Its core, including lifts and a staircase, is to be built around a steel-reinforced concrete structure but the rest of the building, including flats, offices, cafes and a kindergarten, will be fashioned down wooden beams and panels.

"As Norwegians, we are used to working a lot with timber," Nicolai Riise, CEO of the Mad Architects' Practice said.

"The thing about timber is that it demonstrates sustainability from top to bottom. The carbon footprint is close to zero and it's a fantastic material to build with. If you look at this in a broader way, it's one of the ways we are going to be able to beat the climate crisis."

Wooden skyscrapers, once regarded as an unprofitable pipe dream, have become a realistic prospect with the coming of cross-laminated building techniques and more flexible planning laws. Because these structures' parts are fit with care, they can be far lighter than their concrete equivalents and are thought to be relatively resistant to fire. A cubic meter of wood can also take an estimated ton of carbon dioxide out of the atmosphere.

Larger wooden structures are planned elsewhere. London is examining blueprints for the 300-meter Oakwood Tower. A project in Tokyo could rise to 350m.