Four years ago, we asked ourselves: what if we could create a shopping experience with no waiting in lines and no checkout? Or could we create a physical store where customers could simply take what they want and go? Our answer to those questions is Amazon Go, where you could experience the idea of "just walk out shopping".

    Amazon Go is a new kind of store with no checkout required. We created the world's most advanced shopping technology, so you never have to wait in line. With our "just walk out shopping" experience, simply use the Amazon Go app to enter the store, take the products you want, and go! No lines, no checkout.

    Our checkout-free shopping experience is made possible by the same types of technologies used in self-driving cars: computer vision, sensor fusion, and deep learning. Our “ just walk out technology ” automatically detects when products are taken from or returned to the shelves and keeps track of them in your virtual cart. When you have done shopping, you can just leave the store. Shortly after, we'll charge your Amazon account and send you a receipt.

    We offer delicious ready-to-eat breakfast, lunch, dinner, and snack options made fresh every day by our on-site chefs and favorite local kitchens and bakeries. Our selection of food stuff ranges from bread and milk to cheeses and locally made chocolates. You'll find well-known brands we love, plus special finds we're excited to introduce to customers. For a quick home-cooked dinner, pick up one of our chef-designed Amazon Meal Kits, and you can make a meal for two in about 30 minutes.

    Our 1,800-square-foot shopping space is conveniently compact, so busy customers can get in and out fast. It is located at 2131, 7th Ave, Seattle, WA, on the corner of 7th Avenue and Blanchard Street. All you need is an Amazon account, a supported smart phone, and the free Amazon Go app.

    Amazon Go is currently only open to Amazon employees in our testing program, and will be open to the public soon.

    Every country may have to consider what, if anything, to do about "global warming". We should understand that the oft-repeated claim that nearly all scientists demand that something dramatic be done to stop global warming is not true.

    Perhaps the most inconvenient fact is the lack of global warming for well over 10 years now. This is known to the warming establishment, as one can see from the 2009 "Climategate" email of climate scientist Kevin Trenberth: "The fact is that we can't account for the lack of warming at the moment and it is an irony that we can't." But the warming is only missing if one believes computer models where so-called feedback involving water vapor and clouds greatly amplifies the small effect of CO2. The fact is that CO2 is not a pollutant and it is a key component of the biosphere ( 生物圈)'s life cycle. Plants get better growth with more of it and part of the increase of agricultural yields in the past century certainly came from additional CO₂ in the atmosphere.

    Although the number of the scientists who are publicly opposed to the claim is growing, many young scientists secretly say that while they also have serious doubts about the global-warming message, they are afraid to speak up for fear of not being promoted or worse.

    Why is there so much passion about global warming? There are several reasons, but a good place to start is the old question "Cui bono?", or the modern update, "Follow the money". Alarmism (危言耸听) over climate is of great benefit to many, providing government funding for academic research, and thus those people who benefit from this fiercely defended their dogma (信条) and the privileges it brought them.

    Every country should support rational ( 合理 的) measures to protect and improve our environment, but it makes no sense at all to back expensive programs that turn away resources from real needs and are based on alarming but shaky claims of "incontrovertible" evidence.

Dear Editor,

    I am writing to you about the article in your magazine last month about youth crime. As a teenager myself I found the article rather offensive(冒犯的) as it suggested that the largest part of teenagers get into trouble with the police at some time or another. I can honestly say that I have never committed a crime(犯罪) and as far as I know, neither have any of my friends.

    I don't know where the journalist got his information from or if he did any proper research, but the way he described teenagers gave me the impression that he doesn't actually know many teenagers. Maybe when he was younger he was regularly in trouble with the police and that's where he got his ideas from. If this is true then he shouldn't judge other people from his own behaviour in the past.

    Many teenagers I know always help other people in the community, such as raising money for charity and doing voluntary work. A group of us recently spent an entire Sunday morning picking up litter in our local park. We didn't get paid for it; we just wanted to make it cleaner and safer for everyone, especially as many young children and dog walkers use the park.

    Also, as teenagers, we are far too busy studying for exams and doing homework to be "walking the streets every night, looking for trouble", as your journalist wrote in his article. I have to study after school every night during the week. I do get some free time at the weekend but I like to play football, go cycling or swimming, go to the cinema or have coffee with my friends and have a chance to talk to them. I think you will agree that there is nothing criminal about that.

    As your magazine is aimed at young readers, I think your journalists should be more careful about what they write and they should research their ideas better, or you may find that teenagers stop buying your magazine altogether.

Yours sincerely,

Daniel Browning

    Jim Denevan is an amazing artist whose work is admired by all, but owned by none — that's because all of Jim's art is created on an unusual canvas(画布)— the soft sand. He sometimes spends days working on a piece, only to see it washed away by the sea or a storm and that is just the way he likes it.

    Denevan discovered his artistic talents about ten years ago, when he was wandering aimlessly on the beach with a stick. He ended up drawing a 12-foot-long fish. Since then, Jim has traveled over 1,800 miles while creating over 600 pieces of sand art.

    Over the years, his drawings have become bigger, but the tools he uses haven't changed — All he needs is a stick, a garden rake (耙子)and most importantly, his lively imagination!

    Just like any good artist, Jim is quite particular about the "quality" of his canvas, sometimes walking for miles, looking for perfect sand. His latest piece of work, which is also the world's largest freelance (自由职业的)drawing, was created in the desert sand of Nevada. It took Jim three trips, eight days and over 100 miles of walking to create this 3-mile work of art. It took the storm just one night to destroy it! However, Jim says he actually enjoys watching the waves or rain, wash his paintings away.

    Jim's art has become very popular over the years and was even the topic of a documentary named "Sandman" in 2015. Jim Denevan is not just about art in the sand — he is also an excellent chef and founder of an organization called "Outstanding in the Field", whose mottois to celebrate food at its source. Accordingly, group dining events are held outdoors on farms, with the diners being treated to a delicious meal. The events, which are held in different farms throughout America, are always sold out the minute the schedule is announced.

    Skiing has always been a big part of Kamikaze shiffrin's life. Her dad ski raced all through college and her mom raced and coached skiing. The Siffrins taught Mikaela and her brother, Taylor. To ski at a very young age. At two and a half years old, Mikaela made her first ski run down her driveway on plastic skis.

    Mikaela loved skiing. From ages 8 to11, she did hundreds of training runs on small hills to learn the skills of slalom skiing (障碍滑雪). When Mikaela was 11, she began to learn at the Burke Mountain Academy, a Vermont boarding school for skiers. She took classes, studied, and practiced her skiing. According to Burke Mountain Academy headmaster Kirk Dwyer, "What separated Mikaela from others was the degree of her commitment (投入) to be the best. Mikacla practiced more than anyone and believed in herself then and now." At age 14, Mikaela began her international career when she raced in the world championship for13 and 14 -year-olds. And she won!

    By the time she was17, she had already won her first World Cup race. "Living away from home four and five months at a time can be difficult" Mikaela says. "But it can also be exciting. I'm getting to see the world." When Mikaela began ski racing in Europe, her mother, Eileen, stayed with her. She worked as her high school teacher while they were on the road. "She has always been a super-hard worker," says Eileen.

    For Mikaela, working hard is a full-time job. Even her off-season is work time. "If you want something, just try your best," she says. At the 2014 Winter Olympic Games in Sochi, Russia, 18-year-old Mikaela Siffrin became the youngest slalom skier ever to win an Olympic gold medal.

A facial expression results from one or more motions of the muscles of the face. These movements convey the emotional nonverbal communication. They are a primary means of conveying social information among humans, but also occur in most other mammals and some other animal species.

In the business world, much emphasis is placed on your first words, but it isn't all about what you say. You only have seconds to make a first impression that can make or break a relationship in business. Since the face is the first thing we notice about a person, it's vital to use your face to make that important connection.

Researchers have shown that 55 percent of non-verbal communication is facial. People generally try to mask negative expressions such as disappointment, fear or envy, but these feelings are often reflected in their eyes, or the downward turn of the mouth.

Genuine expressions of anger and surprise can be quite brief, lasting for only a few seconds. If an expression remains longer, it may be a sign of insincerity (不真诚). In general, a genuine expression matches the beginnings of a feeling, so watch for expressions that come after the words.

The research conducted last year by a team from Glasgow University, suggested that people from different cultures read facial expressions differently. Not only can that mean confusion in everyday life, but it can lead to confusion when conducting business.

The study found that East Asian participants tended to focus on the eyes of the other person, while Western subjects took in the whole face, including the eyes and the mouth. The work, which was published in Current Biology journal challenged the idea that facial expressions are universally understood. In the study, East Asians were more likely than Westerners to read the expression for "fear" as "surprise", and "disgust "as "anger".