Computers have beaten human world champions at chess and, earlier this year, the board game Go. So far, though, they have struggled at the card table. So we challenged one AI to a game.

Why is poker(扑克)so difficult? Chess and Go are “information complete” games where all players can see all the relevant information. In poker, other players' cards are hidden, making it an “information incomplete” game. Players have to guess opponents' hands from their actions—-tricky for computers. Poker has become a new benchmark for AI research. Solving poker could lead to many breakthroughs, from cyber security to driverless cars.

    Scientists believe it is only a matter of time before AI once again vanquishes humans, hence our human-machine match comes up in a game of Texas Hold's Em Limit Poker. The AI was developed by Johannes Heinrich, researcher studying machine learning at UCL. It combines two techniques: neural(神经的)networks and reinforcement learning(强化学习).

    Neural networks, to some degree, copy the structure of human brains: their processors are highly interconnected and work at the same time to solve problems. They are good at spotting patterns in huge amounts of data. Reinforcement learning is when a machine, given a task, carries it out, learning from mistakes it makes. In this case, it means playing poker against itself billions of times to get better.

    Mr Heinrich told Sky News: “Today we are presenting a new procedure that has learned in a different way, more similar to how humans learn. In particular, it is able to learn abstract patterns, represented by its neural network, which allow it to deal with new and unseen situations.”

    After two hours of quite defensive play, from the computer at least, we called it a draw.

    A. High tech with traditional life at Green Bank.

    Over millions of years, penguins（企鹅）have developed a keen sense of where to find food. Once they're old enough, they set off from the shores on which they were hatched for the first time and swim long distances in search of tasty fish like anchovies and sardines. But they don't search directly for the fish themselves.

    For example, when young African penguins head out to sea, they look for areas with low surface temperatures and high chlorophyll(叶绿素) because those conditions signal the presence of phytoplankton（浮游植物）. And lots of phytoplankton means lots of plankton（浮游动物）, which in turn means lots of their favorite fish. Well, that's what it used to mean.

    Climate change plus overfishing have made the penguin feeding grounds a mirage(海市蜃楼). The habitat is indeed plankton-rich—but now it's fish-poor. Researchers call this an “ecological trap.”

    “It's a situation where you have a signal that previously pointed an animal towards good quality habitat. That habitat's been changed, usually by human pressures. The signal stays, but the quality in the environment deteriorates.”

    Richard Sherley, a zoologist at the University of Exeter and his team used satellite imaging to track the African penguins from eight sites along southern Africa. Historically, the birds benefited from tons of fish off the coasts of Angola, Namibia and western South Africa, but now they're going hungry.

    “I was really hoping we'd see them going east, and finding areas where the fish had moved to but it ends up being quite a sad story for the penguins.” said Richard.

    The researchers calculate that by falling into this ecological trap, African penguin populations on South Africa's Western Cape have declined by around 80 percent.

    Some research groups are exploring the idea of moving chicks to a place where they can't get trapped, like the Eastern Cape. But Sherley thinks that a longer-term solution means making and carrying out rules to create more sustainable(可持续的) fishing industry, something that he says needs public support.

    Alex Elman runs a big business—something hard to imagine after she lost her sight in her twenties. But Elman says that losing her sight helped her focus on finding success.

    Elman's father planted a hillside vineyard(葡萄园)in western Massachusetts in 1981. It's where Elman spent the darkest period of her life. When she was 27 years old, she went blind as a result of diabetes(糖尿病) 17 years ago. She recalled，“I hid in my home. I hid in the place，to me, that was the safest place in the world.”

    However, she found a new way forward.

    Elman is the founder of Alex Elman Wines, a growing competitor of organic wines from all around the world: Chianti from Italy, Torrontes from Argentina.

    Elman's isn't solitary in her work. Instead, she has a good assistant, a guide dog named Hanley. Hanley is something of a professional wine taster and travels to all of the wine factories that Elman runs, from South America to Europe.

    At first, Elman wouldn't accept a guide dog. Now it's hard to imagine her life, or her business, without him. She said, "When someone tells me something is organic and I don't really believe it because I taste something funny on it, m put it in front of his face and if he likes the wine, he'll actually go in and sniff it. If if s not right, he'll turn his head away. That's how we know whether the soil is actually organic.”

    Elman believes the loss of her sight was a gift from God. She said, “It allowed me to pay attention to what I thought was important. Therefore, adapt to a situation, and you'll be all right. Because you can't change it anyway, right?”

    Asia can boast(吹嘘) that it has some of the best beaches in the world. Sihanoukville, Cambodia is a seaside town located 200km or a four­hour bus ride away from the country's capital, Phnom Penh. With several beaches and small offshore islands, it is definitely not a place to miss out if you are intending to visit Angkor Wat, as the beaches there are stunning and still unspoiled by mass tourism.

    Serendipity Beach

    Serendipity Beach is the most popular beach for the masses, since it is the most accessible beach, being the nearest one from the main town area. There are plenty of bars scattered around the beach, so be prepared for the crazy parties every night.

    Ochheuteal Beach

    Ochheuteal Beach is located south of Serendipity Beach, and it's a bit of an improvement from Serendipity Beach itself in terms of the people that go there. Over here, there are bars and pubs, but at night, don't expect wild parties like at the Serendipity Beach area.

    Otres Beach

    All the way down south, near Moat Peam, lies a hidden gem called Otres Beach. This is where you can get your yoga suit on and practice meditation(冥想). This is the quietest beach in Sihanoukville and it is the least crowded, with very few parties. If your idea of a beach holiday is just yourself and the sun, sea and sand, this place is for you.

    Koh Rong

    Koh Rong is an island off Sihanoukville that is covered with beautiful sandy beaches. True relaxation lies at Long Beach, which is located on the other side of the island. Clear water surrounds the beach, and once you get there, you'll be greeted with fine white sand.

    Koh Rong doesn't have any roads, so there are no cars or motorbike rentals — everything is mostly on foot.

    Do you know of anyone who uses the truth to deceive(欺骗)?When someone tells you something that is true, but leaves out important information that should be included, he can give you a false picture.

    For example, someone might say,“I just won a hundred dollars on the lottery(彩票).It was great. I took that dollar ticket back to the store and turned it in for one hundred dollars!”

    This guy's a winner, right? Maybe, maybe not. We then discover that he bought $200 worth of tickets, and only one was a winner. He's really a big loser!

    He didn't say anything that was false, but he left out important information on purpose. That's called a half-truth. Half-truths are not technically lies, but they are just as dishonest.

    Some politicians often use this trick. Let's say that during Governor Smith's last term, her state lost one million jobs and gained three million jobs. Then she seeks another term. One of her opponents(对手) says,“During Governor Smith's term, the state lost one million jobs!”That's true. However, an honest statement would have been,“During Governor Smith's term ,the state had a net gain of two million jobs.”

    Advertisers will sometimes use half-truths. It's against the law to make false statements so they try to mislead you with the truth. An advertisement might say,“Nine out of ten doctors advised their patients to take Yucky Pills to cure toothache.”It fails to mention that they only asked ten doctors and nine of them work for the Yucky Company.

    This kind of deception happens too often. It's a sad fact of life: Lies are lies, and sometimes the truth can lie as well.

Art galleries are places in which artists can display all types of works of art, including paintings, drawings, photographs, sculptures, etc. {#blank#}1{#/blank#} At the same time, however, each artwork must be protected from exposure to too much light since that can cause works to fade and therefore get ruined. {#blank#}2{#/blank#}.

The most common form of lighting used to light up the artwork is indoor spotlights on tracks attached to the ceiling near where the work is being displayed. {#blank#}3{#/blank#}. It permits the lights to be moved more easily when the light patterns require adjusting. Recessed(嵌入的) lights in walls and ceilings can be useful so long as they are not fixed in place but can instead be easily moved to create ideal light patterns. Most art gallery directors state that a combination of tracked and recessed light equipment is ideal because the tracked lights focus directly on the artwork while the recessed lights are used in the nearby walls to provide a surrounding light source. {#blank#}4{#/blank#}.

How to angle the lights depends upon the height of the ceiling and the size of the artwork. Caution must be taken to avoid creating too many areas with shadows or to have the lights cause a glare on the artwork. Besides, the lights should not be bare bulbs(电灯泡) burning directly on the artwork but should be made in some way to make the lighting softer. According to experts, low voltage(电压) bulbs are the best to use when lighting artworks. {#blank#}5{#/blank#}. Thus artworks should be placed in a room where sunlight cannot directly hit them.

A. It can make the displays attractive.

B. Using tracked lighting is beneficial.

C. Light plays a key role in art galleries.

D. This light source can better improve the mood surrounding the work.

E. To better improve their appearance, the display area needs to be well lit.

F. Finding a happy medium between not enough light and too much of it requires considerable skill and experience.

G. Above all, natural light should be avoided since direct sunlight will damage artworks, particularly paintings, over time.