People all need friends because nobody wants to be lonely and a friend can help you in good and bad times. You've made friends since childhood, but you still don't know who your true friends are. Here are some signs to tell you if your friend is a true friend:

Always honest

    Honesty is important to keep a relationship alive. A true friend always tells you the truth. It may be hard sometimes but lying can destroy a friendship. It is important that your friend speaks honestly and never makes up stories.

______________

    There are always periods in your life when you have problems or difficulties. A true friend will always have time to listen to your problems and give advice. It may not be able to offer a solution to your problems but the fact that your friend made time to listen is a sign he/she cares for you. Your friend is not a true friend if he/she can never make time for you when you are in trouble. You also need to be reasonable and accept that your friend also has other things to do so he/she can't always listen immediately to your problems.

Always respectful

    A true friend will always respect your opinion no matter whether he/she agrees or not. Your true friend may disagree but never insists that he/she is correct.

Always understanding

    It is possible that some problems will arise between you and your friend. A true friend will always be forgiving and understanding even if it isn't his /her fault. We are all different people and we all make mistakes. A true friend is always forgiving and understanding because he/she doesn't want to take the risk of losing his/her best friend.

    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（虚拟购物车）. When you've done shopping, you can just leave the store. Shortly after, we'll charge your Amazon account and send you a receipt(收据).

    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 foodstuff 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(紧凑的), 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 smartphone, 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.

    A study showed that the experiences children have in their first few years are important. These experiences affect the development of the brain. When children receive more attention, they often have higher IQs. Babies receive information when they see, hear and feel things, which makes connections between different parts of the brain. There are a hundred trillion(万亿)connections in the brain of a three-year-old child.

    Researcher Judit Gervain tested how good newborns are at distinguishing different sound patterns. Her researchers produced images of the brains of babies as they heard different sound patterns. For example, one order was mu-ba-ba. This is the pattern"A-B-B". Another order was mu-ba-ge. This is the pattern “A-B-C”. The images showed that the part of the brain responsible for speech was more active during the" A-B-B" pattern. This shows that babies can tell the difference between different patterns. They also were sensitive to where it occurred in the order.

    Gervain is excited by these findings because the order of sounds is the building block of words and grammar." Position is key to language," she says. "If something is at the beginning or at the end, it makes a big difference: John caught the bear.' is very different from 'The bear caught John.'”

    Researchers led by scientist Patricia Kuhl have found that language delivered by televisions, audio books, the Internet, or smartphones－no matter how educational－doesn't appear to be enough for children's brain development. They carried out a study of nine-month-old American babies. They expected the first group who'd watched videos in Chinese to show the same kind of learning as the second group who were brought face-to-face with the same sounds. Instead they found a huge difference. The babies in the second group were able to distinguish between similar Chinese sounds as well as native listeners. But the other babies－regardless of whether they had watched the video or listened to the audio－learned nothing.

    The U. S. Thanksgiving holiday is symbolized (象征) by its traditional food-roast turkey. But turkey is certainly not from Turkey. In fact, its English name is based on one big mistake. We could say it is a case of mistaken identity. The word "Turkey" has meant "the land of the Turks" since ancient times. In the mid-1500s, the word "turkey" was first used to refer to the bird in the English language.

    The misunderstanding over the word happened because of two similar-looking kinds of birds.

    There is an African bird called the guinea fowl(珍珠鸡). It has dark feathers with white spots and a patch of brown on the back of its neck. Traders brought the guinea fowl to Europe through North Africa. This foreign bird came to Europe through Turkish lands. So, the English thought the bird as a "Turkish chicken".

    When Europeans came to North America, they saw a bird that looked like the guinea fowl. This bird was native to the North American continent. But they thought that it was the guinea fowl, which at that time, was called the "turkey cock", so they gave it the same name.

    Hundreds of years later, we continue to call this North American bird "turkey", even though it has no connection at all with the country Turkey, or even with Europe.

    But English is not the only language with interesting names for this North American bird.

    The Turkish call turkey "hindi", the Turkish name for India. The reference(涉及)to India probably conies from the old wrong idea that the New World was in Eastern Asia.

    The French call it "dinde", a name that also connects the bird to India. "Dinde" means "from India" in the French language. "Turkey" has similar names in several other languages.

    The Internet has completely changed the workplace over the past three decades. Artificial Intelligence is now all set to do the same, and businesses that don't take advantage of the technology risk being left behind.

    Global tech giants (巨头) like Amazon have been leading the change, and businesses of all sizes are now using the technology for employing and managing their staff.

    Among them is L'Oreal. With about a million applicants for roughly 15,000 new positions each year, the company is using AI to hire.

    “We really wanted to save time and focus more on quality, diversity and candidate experience. And AI solutions were the best way to go faster on these challenges, said Eva Azoulay, global vice-president of L'Oreal's Human Resources Department.

    The company uses Mya, a chatbot, to save employers' time during the first stage of the process. It handles routine questions from candidates, and checks details such as availability and visa requirements. Should candidates make it to the next round, they'll run into Seedlink, an AI software that scores applicants based on their answers to open-ended interview questions. These scores don't replace human judgment, said Azoulay, but they do pick out candidates who might not seem like obvious choices.

    Early results have been promising. For one internship program, where 12,000 people apply for about 80 spots, employers claim they saved 200 hours of time while hiring the most diverse group to date.

    Other businesses have gone beyond employment and are using AI to help manage employees. Some UK firms have started using Isaak, a system designed by the London-based company StatusToday, to track how many hours staff spend online and the number of emails they receive. London real estate agent JBrown has been using this system since March. CEO James Brown said it helps the firm understand employees' habits and prevent them from overworking. "It enables us to solve bottleneck problems and relieve overburdened employees," he said.

    Despite these examples of good practice, there is still a long way for AI to reach its full potential (潜力), and the technology comes with risks. Another AI danger could be its impact on jobs through automation (自动化). McKinsey predicts AI could add $13 trillion to the global economy by 2030, with early adopters doubling their cash flow over that period. But the demand for repetitive (重复的) or digitally-unskilled jobs could drop by around 10%, the consulting firm said in a 2018 report.

    ①An increasing number of young people tend to rent clothes recently. Clothing rental is a hot new industry and retailers are entering this in hopes of attracting newly conscientious shoppers. This past summer alone, Urban Outfitters, Macy's, Bloomingdale's, American Eagle, and Banana Republic have all announced rental services—a sure sign of changing times.

    ②But is renting fashion actually more environmentally-friendly than buying it, and if so, how much more? Journalist and author Elizabeth Cline explored into this question and she concluded that it's not as sustainable as it seems.

    ③Take shipping, for example, which has to go two ways if an item is rented—receiving and returning. Cline writes that consumer transportation has the second largest carbon footprint(碳足迹)of our collective fashion habit after manufacturing.

    ④She writes, "An item ordered online and then returned can emit(排放)20 kilograms of carbon each way, and up to 50 kilograms for rush shipping. By comparison, the carbon impact of a pair of jeans purchased in physical stores and washed and worn at home is 33.4 kilograms, according to a 2015 study by Levi's."

    ⑤Then there's the burden of washing, which has to happen for every item when returned, regardless of whether or not it was worn. For most rental services, this usually means dry-cleaning, a high-impact and polluting process. 70 percent of US dry cleaners used perchloroethylene, a carcinogenic(致癌的)air pollutant, which can produce harmful waste and air pollution .

    ⑥Le Tote is the only service that uses 'wet cleaning' for 80 percent of its items and strives to avoid dry cleaning unless absolutely necessary.

    ⑦Lastly, Cline fears that rental services will increase our appetite for fast fashion, simply because it's so easily accessible. There's something called ‘share-washing' that makes people engage in more wasteful behaviors precisely because a product or service is shared and thus is perceived as more eco-friendly.

    ⑧Renting clothes is still preferable to buying them cheap and pitching them in the trash after a few wears, but we shouldn't let the availability of these services make us complacent(自鸣得意的). There's an even better step --and that's wearing what is already in the closet.