Researchers at the University of Kansas say that people can accurately judge 90 percent of a stranger's personality simply by looking at the person's shoes. “Shoes convey useful information about their wearers”, the authors wrote in the new study published in the Journal of Research in Personality．

    Lead researcher Omri Gillath said the judgments were based on the style, cost, color and condition of someone's shoes. In the study, 63 University of Kansas researchers looked at pictures showing 208 different pairs of shoes worn by the study's participants. Volunteers in the study were photographed in their most commonly worn shoes, and then filled out a personality questionnaire.

    Some of the results were expected: People with higher incomes most commonly wore expensive shoes, and flashier shoes were typically worn by outgoing people. However，some of the more specific results are strange enough. For example, “practical and functional ''shoes were generally worn by more “pleasant" people, while ankle boots were more linked with “aggressive” personalities. The strangest of all may be that those who wore “uncomfortable looking” shoes tend to have “calm” personalities. And if you have several pairs of new shoes or take extreme care of them, you may suffer from “attachment anxiety", spending lots of time worrying about what other people think of your appearance. There was even a political calculation in the mix with more liberal (主张变革的) types wearing “shabbier and less expensive” shoes.

    The researchers noted that some people will choose shoe styles to mask their actual personalities, but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing the deep side of their personalities.

    I came to study in the United States a year ago .Yet I did not know the real American society until I was injured in a car accident because after the accident I had to see a doctor and go to court.

    After the accident, my roommate called a doctor for me. I was very grateful and determined to repay him one day. But the next day, he asked me to pay him $200 for what he had done. I was astonished. He had good reason to charge me, he said. And if I wanted to collect money from the person who was responsible for my injury, I'd have to have a good lawyer. And only a good doctor can help me get a good lawyer .Now that he had helped me find a good doctor, it was only fair that I should pay him.

    But every day I went to see the doctor, I had to wait about 50 minutes. He would see two or three patients at the same time, and often stop treating one so as to see another. Yet he charged me $115 each time .The final examination report consisted of ten lines, and it cost me $215.

    My lawyer was all smiles the first time we met. But after that he avoided seeing me at all. He knew very well the other party was responsible for the accident, yet he hardly did anything. He simply waited to collect his money. He was so irresponsible that I decided to dismiss him. And he made me pay him $770.

    Now I had to act as my own lawyer. Due to my inexperience, I told the insurance company the date I was leaving America. Knowing that, they played for time...and I left without getting a cent.

    I was in the middle of coding a web page when my wife emailed me these questions: Ever wonder what it would be like to have the face, the brains, the personality and the body? What it would be like to have everyone stop when you walk in a room? What it would be like to be able to get anything or anyone you want? I stopped for a moment and thought about it because my wife wouldn't email me this unless something had driven her to do so. I emailed her back with what I thought was a pretty good answer. Here is what I wrote her back.

    Yes, I had thought many times about what it would be like to be one of the beautiful people. To be able to take your breath away when I walked into a room, or to be the life of the party and have everyone fawning (奉承) over me as I wore only the finest clothes and sported the perfect body? But then I always came back to the realization that a lifestyle like that is so fragile. As you get older, your body changes; as you get older, the money changes. Your body never looks the same, the clothes become more and more expensive to maintain. And once you have crossed the line, suddenly you are out. The next fresh face comes in and you are quickly forgotten.

    All through growing up I was never an attractive person. I was overweight and picked on. But that didn't stop me from being a nice person — a good, clean, funny and helpful person. I was the person who you came to when you needed a friend after a breakup. I was the one you came to when you needed a joke to brighten up your day. And in the long run, I will be the one you remember, not the new face, or the fresh style.

    In closing, I would like to say that we, as a people, have developed into looking (or things that are bigger and better instead of what will last. I don't know about you, but I will remember the friend who helped me when I was down, more than the hot girl I just saw walking down the street.

    I wish I could teach the world some more jokes.

    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.

    If you're a cycling lover, you will have to pay a lot of attention to your bicycle and maintain it well, for bicycle parts are exposed to wear and tear (磨损) over time and you have to examine the bicycle to see if there are any signs of wearing such as scratches, dents (凹陷) etc. Sometimes, a part may not work because it has exceeded its life expectancy. Sometimes, you will need to find replacement parts for it to keep up the performance of the bicycle.

    Different parts of a bicycle will wear at different rates so it is very important that you have a basic understanding about the role played by each part. One of the most important parts of the bicycle is the frame. You will need to choose a frame that lasts for a very long time. Of course, you will see some paint scratches after some time. When you're selecting a frame, you have to think about the material. Aluminium (铝) frames will not rust easily, but they have a higher chance to dent. Steel frames will be hard to dent, but you will need to make sure they get a good paint job so that they won't rust.

    Wheels also experience a lot of wear and tear and you should go for a professional seller when you want to buy wheels. There are different types of wheels that you can buy, like Zipp wheels that provide more aerodynamic efficiency (空气动力学效能). Investing in new tyres instead of going for used is a good idea because you will be able to get more use out of it. The same goes for chain as there's a higher chance of a used chain breaking. You may also experience shifting problems. However, some parts of bicycles such as pedals can be used for a long time and you can find different styles.

    Other parts that you can buy used are seats, handlebars and the stem. When you are buying handlebars, you have to see if there are any dents or if they have been bent out of shape. There shouldn't be any cracks in the seat post or the handlebars. There are many shops where you can buy parts, so you will have to check the references to see how customers respond to them before you buy anything.

    On a sunny, spring day, a group of children, four to seven years old, sit on their bicycles. They wear helmets to protect their heads and gloves to protect their hands. Their mothers, standing nearby, watch them closely. The children are ready to learn how to ride. Rachel Varn still remembers how she felt riding a bicycle for the first time. She says, "It is probably the biggest confidence booster (提升). It gives kids such a sense of independence and self-guidance." Now, her job is helping children experience that moment.

    Rachel Varn left her job of selling bicycles to become a trainer for bicycle riding last year. She founded Pedal Power Kids to teach bicycle education. Before starting a ride she teaches the children how to make sure the bicycles are in good condition for safe use. She calls it " the ABC quick check." "A" is for air. she explains, "We have to check out tires before we ride. "B" is for brakes. We want to make sure our brakes work before we find ourselves at the top of a hill about to go down. And "C" is for chain." She says the chain must be clean.

    The rest of the training is more fun. The children learn riding skills, from balance and pedaling to turning, starting and stopping. And they learn to keep their eyes up and look ahead while riding. Varn says many children struggle to do this. They look down at the pedals instead. She adds, " Obviously that doesn't allow them to see what's going on around them, and it doesn't allow them to turn properly either." Varn says watching where you are going helps you turn easier.

    Learning to ride a bicycle can open a whole new world to children. It gives them a sense of accomplishment and freedom. They become more sensitive to their surroundings and better able to make safe, smart decisions going from one place to another. Varn's goal is to get more children on two wheels. She says," That's really a great way for kids to be active and develop healthy habits. It helps reduce pollution and just keep families and communities connected."