The Bronte sisters were three sisters who became famous novelists． Their lives and works are connected with the lonely moors of Yorkshire, England, where they lived． Patrick Bronte, the sisters' father, was a poor Irishman who became the parish clergyman of the small, isolated town of Haworth, Yorkshire． Bronte was somewhat strange and tended to be strict． His wife died in 1821 and her sister brought up the family out of duty, but with little love or understanding． The sisters went to several boarding schools where they received a better education than usual for girls at that time, but in a bad atmosphere．

Few jobs were available for women at that time, and the Bronte sisters, except for occasional jobs as governesses or schoolteachers, lived their entire lives at home． They were shy, poor, and lonely, and occupied themselves with music, drawing, reading and —above all—writing． Their isolation led to the early development of their imaginations． In 1846, under the male pen names of Currer, Ellis, and Acton Bell, the sisters published a joint volume of poems．Although only two copies were sold, all three sisters soon had their first novels published．

    Charlotte Bronte's most famous novel Jane Eyre （1847） is largely autobiographical ． Through the heroine, Charlotte relived her hated boarding school life and her experiences as a governess in a large house． Rochester, the hero and master of the house, is fictional． Jane Eyre was enormously successful, but many readers were shocked that Rochester, who tried to make Jane his mistress, should be rewarded by marrying her． Some readers were also shocked because Jane wanted to be regarded as a thinking and independent person, rather than as a weak female．

    Charlotte Bronte wrote three other novels． The first one, The Professor, was not published until 1857, after her death． Shirley （1849） is set among the labour riots of the early 1800s． Villette

    My first book had been rejected by every major American publisher. My first agent, wasn't communicating. My dream of a life as a successful author was in tatters.

"It isn't going to happen," I said to my friend. "And I have to accept it."

"If you lose faith in your product, no one else will have faith in it," she told me.

    And, I knew she was right. But, how could I believe in myself when I hit a wall at every turn? I knew I had a good product. The book featured interviews with world-famous people who had learned how to succeed and lead—the hard way. It had information that could help other people. As a consumer, I would have loved that book because it had the great wisdom I so desperately needed. And, their stories made for good reading. I had a good book. What I didn't have was a publisher. I had to find a way to get that book sold and on the shelves. But, how?

    The hardest challenge was forcing myself to do battle again. I had to find the strength to believe in myself when it seemed like no one else believed in me. When I hit a wall, I usually need to get more information to figure out what is going wrong. So, I did some research and found out that my initial vision for the book-where all the interview subjects got their own chapters-wasn't marketable to big publishers because that format does not sell tons of books. What I had to do was recognize, restructure and rewrite.

    I needed an agent. There are thousands of agents. Surely one of them was right for me. So, I started sending out query（询问）letters. Within a week, I had a dozen agents who wanted the book. I chose the one who I thought would believe in me and my dream. She did get me my choices of publishers.

    Hard won Wisdom wound up being a best-selling book. But, it almost never was.

    First, I want to tell you how proud we are. Getting into Columbia shows what a great well-rounded student you are. Your academic, artistic, and social skills have truly blossomed（开花）in the last few years. You have become a talented and accomplished young woman. You should be as proud of yourself as we are.

    College will be the most important years in your life. It is in college that you will truly discover what learning is about. I want to tell you: “education is what you have left after all that is taught is forgotten”. What I mean by that is the materials taught isn't as important as you gaining the ability to learn a new subject, and the ability to analyze a new problem. That is really what learning in college is about—this will be the period where you go from teacher-taught to master-inspired, after which you must become self-learner.

    Follow your passion in college. Take courses you think you will enjoy. Steve Jobs says when you are in college, your passion will create many dots, and later in your life you will connect them. In his great speech given at Stanford, he gave the great example where he took calligraphy（书法）, and a decade later, it became the basis of the beautiful letters in Microsoft Word. So don't worry too much about what job you will have, and don't be too utilitarian（功利的）, and if you like Japanese or Korean, go for it! Enjoy picking your dots, and be assured one day you will find your calling, and connect a beautiful curve through the dots.

    Most importantly, make friends and be happy. College friends are often the best in life, because during college you are closer to them physically than to your mom and I. Pick a few friends and become really close to them-pick the ones who are honest and sincere to you. Don't worry about their hobbies, grades, looks, or even personalities. You have developed some real friendships in high school in your last two years, so trust your instinct, and make new friends.

    College is the four years where you have the greatest amount of free time, the first chance to be independent, the most possibilities to change and the lowest risk for making mistakes. So please treasure your college years! May Columbia become the happiest four years in your life, and may you blossom into just what you dream to be.

    A five-year-old dog named Kelsey has been praised as a hero for helping to save the life of her owner who slipped in the snow and broke his neck.

The man, Bob, was alone when he left his Michigan farmhouse on New Year's Eve to collect firewood. Expecting a journey of only several meters, Bob was wearing just long johns(衬裤), a shirt and slippers when he went outside, although the temperature was around-4℃.

    After the accident, he was unable to move in the snow. Fortunately, Kelsey came to his assistance.

    "I was shouting for help, but my nearest neighbor is about 400 meters away, and it was10:30 pm," Bob explained. "But my Kelsey came. By the next morning, my voice was gone and I couldn't yell for help, but Kelsey didn't stop barking."

    Kelsey's companion kept him warm by lying on top of him. She licked his face and hands to keep him awake. "Kelsey kept barking but never left my side," Bob recalled. "She kept me warm. I knew I couldn't give up and that it was my choice to stay alive."

Bob spent 20 hours in the freezing cold. When he finally lost consciousness, his dog kept barking. Finally, hearing the barking, Bob's neighbor discovered him at 6:30 pm on New Year's Day and called the emergency services at once. When Bob arrived in hospital, his body temperature was below 21℃. However, doctors were surprised to find that he didn't have any frostbite(冻疮). They believed it was because of Kelsey's determination to keep him warm. Dr. Chaim Colen, the doctor who treated Bob, said, "Animals can help and his dog really saved him... He was very fortunate.

    Bob said he was "enormously" grateful to both Dr. Colen and his Kelsey. "They saved my life. They are truly heroes!"

    Alexa is a form of artificial intelligence, or AI for short. Many people start their mornings by asking Alexa for the weather forecast or the latest news. A device(设备) that houses Alexa can also play music from your favorite playlists, keep a shopping list, order takeout food, answer questions, send messages and even run “smart” home controls.

    Training AI systems to respond to problems with human-like intelligence and learn from their mistakes can take months, or even years. Consider Alexa and similar software, such as Apple's Siri. To do the tasks its human owners ask, these systems must make sense of and then respond to sentences such as, “Alexa, play my Ed Sheeran playlist” or “Siri, what is the capital of India?”

    Computers can't understand language as it is spoken by people. So AI researchers must find a way to help humans communicate with computers. The technology used to get computers to “understand” human speech or text is known as natural language processing. By natural language, computer scientists refer to the way people naturally talk or write. To teach an AI system a task like comprehending(理解) a sentence or responding to a person 's last move in a board game, scientists need to feed it lots of examples.

AlphaGo is an AI system designed by Google that has beaten a human champion, Lee Sedol, at the strategy(策略) board game Go. To train AlphaGo, Google had to show it 30 million Go moves that people had made while playing the game. Then AlphaGo used what it learned to analyze those plays as it played against different versions (版本) of itself. During this practice, the program came up with new moves—ones never seen in games between people.

    After years of trying, our neighbors convinced my parents that ice fishing would be a fun winter getaway from our dairy farm. Before that, their idea of entertainment involved driving around the countryside to see how the neighbors' crops were doing.

My parents eventually built a fish house and set it up on Wood Lake. We excitedly headed for the lake on many January and February weekends. By the time we arrived at our favorite fishing spot across the lake each day, somebody had usually made a clear path across the ice. The fish houses were together at the best fishing spots, forming some kind of a neighborhood.

    Our house was large enough so all four of us could fish at the same time. Each corner had a square cut out of the floor. We sat in comfort. You'd think ice fishing would be cold, but we had a small woodstove (木炉) inside, and we put snow around the bottom of the house to keep the wind from blowing underneath.

    Besides the thrill of watching your bobber (钓鱼浮标) dip below the water, lunch was always the highlight of the day. Mom would fry pork or hamburgers in a pan. The smell of cooking meat was the envy of every other fish house in the neighborhood.

    Our days passed with a mix of quiet time and family chatter. We talked about the farm or school. And of course, we shared fishing advice. Part of the fun of ice fishing was learning to understand and trust the sounds of the frozen lake. Healthy ice "talks" as it freezes and shifts. You could often hear the sound of a crack traveling through the ice.

    People who have never tried ice fishing may not think it sounds very exciting, but it was for us. Fishing trips were an adventure. We didn't always catch fish, but we always brought home great memories of a day with family and friends.