Grammar is the system of a language. People sometimes describe grammar as the “rules” of a language; but in fact no language has rules. If we use the word “rules”, we suggest that somebody created the rules first and then spoke the language, like a new game. But languages did not start like that. Languages started by people making sounds which evolved (逐渐发展成) into words, phrases and sentences. No commonly-spoken language is fixed. All languages change over time. What we call “grammar” is simply a reflection (反映) of a language at a particular time.

    Do we need to study grammar to learn a language? The short answer is “no”. Very many people in the world speak their own, native language without having studied its grammar. Children start to speak before they even know the word“grammar”. But if you are serious about learning a foreign language, the long answer is “yes, grammar can help you to learn a language more quickly and more efficiently.” It's important to think of grammar as something that can help you, like a friend. When you understand the grammar (or system) of a language, you can understand many things yourself, without having to ask a teacher or look in a book.

So think of grammar as something good, something positive, something that you can use to find your way—like a signpost(路标) or a map.

    Except invented languages like Esperanto（世界语）. And if Esperanto were widely spoken, its rules would soon be very different.

    Nearly 19 percent of teachers of color (有色人种教师) left their jobs after the 2014-2015 school year. Some left for personal reasons like taking care of their families. But 50 percent said they left because they were dissatisfied with their employment situation, such as poor working conditions, student discipline problems and large class sizes. Thus, taking immediate measures to improve it is our top priority.

    For years, researchers have proved the benefits of increasing the share of minority teachers in schools, especially as our public school system has turned to one that is made up mostly of minority students. Teachers of color, who are more likely than their white counterparts to choose to work in racially diverse (多种多样的) schools, offer particular benefits to their students. Graduation rates increase among minority students when they are taught by racially similar educators, research shows. They can also serve as positive role models, and their presence reduces the chance of racial discrimination at school.

    The Shanker Institute report suggests that the rate of minority teacher hiring is not the whole problem. The problem is what happens after these teachers enter the classroom. These teachers often work in high-poverty rural schools. They are more likely to have less-desirable working conditions.

    Diversity is a key component to equality and opportunity. Where there's a diverse teaching workforce, all kids thrive. So solutions must be found at once to turn this trend around. Firstly, schools should develop mentorship programs that support minority teachers once they are in the classroom. Secondly, more money should be spent in improving working conditions in these schools. Of course, school headmasters should also be evaluated on their ability to retain teachers of color.

    The town of Green Bank, West Virginia, is the site of the largest radio telescope in the world, so Internet connections and anything else that can create electromagnetic(电磁的) waves, such as smart phones and microwave ovens, are banned.

    Green Bank is frozen in time, somewhere in the 1950s, because there's a 33,000-square-kilometer zone of silence due to the telescope. Cell phone towers are forbidden.

    The closer you get to the telescope, the greater the restrictions. There's a 16-kilometer radius(半径) around the observatory where radio-controlled items, even toys, cannot be used.

    Telescope employees even work in a special room that blocks electromagnetic waves from leaving it. “Here imagine a submarine(潜艇), water cannot get inside, and so this room is an electric submarine. No electromagnetic waves can get into this room, just as you can't go beyond it,” Michael Holstein, an observatory officer, said.

    The size of a football field, the telescope is so sensitive that it could pick up signals sent from an alien world. And scientists can't wait for that to happen.

    “All the signals that we now receive with the help of telescopes are signals that come from cosmic objects — stars, galaxies. We have not yet received anything from intelligent civilizations,” scientist Richard Lynch said.

    Local people respect the work of the scientists. “Yes, we are different. Many would say that we live the old-fashioned way, in the past. But for us, it's just the way of life that we have always lived,” Sherry said.

    “When we want to meet friends, we just call each other on a wire phone. And instead of sitting in front of your screen, we talk, we go fishing, to the mountains,” resident Sherry said.

    For the latest news, residents read the weekly local newspaper. When she's looking for a phone number, Sherry reaches for the phone book.

    And instead of Facebook, Sherry enjoys daily conversations with her customers. In this town, everyone knows each other and communication is face to face.

    The tough economy is bringing new shoppers to the secondhand market.Plato's Closet in Charlotte,NC is a private company,which mainly buys and sells used clothes.While Charlotte has outstanding secondhand stores offering high-end and graceful brands for women,most of their stock applies to adults.Plato's closet targets teens and those in their 20s.

    Plato's Closet,with stores in Matthews and the university area,sells clothes and accessories（装饰品）that are currently popular at about one third the retail（零售）prices.

    The two hottest brands,for buying and selling,are Hollister and Abercrombie & Fitch.Even though the offerings tend to be suitable for young people,there are a variety of shoppers at Plato's Closet of varying ages.Women in their 30s,40s,and older could easily find a purse,jacket or piece of jewelry they like.

    If you are selling

    Unlike higher-end resale stores which usually work on consignment（寄售）,Plato's Closet buys on the spot.

    Items can be gently used,but must be in very good condition.

    Clothes should be less than two years old and styles should be the same as those still being sold at the shopping center.

    There is no negotiation;prices are set company-wide.If what you sell amounts to $30 or less,they'll give you cash.More than that,you'll get a Visa cash card.

    Secondhand success

    Don't get discouraged if you can't find something on your first trip.Resale shops are always getting new lists of goods and change their styles with each season.

    Be sure to check each piece carefully before buying.

    Price comparison

    Jackets: New York & Company black blazer,$12; retail: $37.

    Pants: Express Editor-style pants,$12; retail: $69.90.

    Shoes: Nine West black peep-toe pumps,$12; retail: $89.

    Jewelry: Necklaces,$3-$5; retail: $18-$30.

    In the movie Alice in Wonderland, Alice comes across a Cheshire cat and asks the cat which road she should take. The cat responds, “Well, that depends on where you're trying to get to.” Alice replies, “I don't know.” The cat responds, “Then any road will do.”

    You see, knowing where you're going increases your chances dramatically of getting there, and there is no better way of “GETTING THERE” than setting your goals for the upcoming year. Think of your goals as destinations and the action steps as your GPS guiding and directing you. If you are like many other people, for years you have resisted the need to set goals and even laughed at the thought that setting goals and，even more importantly, committing them to writing have positive effects on your life. However, a closer look might convince you that setting goals is a sensible thing to do.

    In 1979, a class of Harvard MBA students was asked: Have you set clear, written goals for your future and made an action plan to accomplish them? The following will astonish you. Only 3 percent of the class had written goals and a plan in place, 13% just had goals, and an amazing 84% had no specific goals at all.

    Ten years later the numbers of the class were interviewed once again and the following results will no doubt give the reason for our setting goals. The findings were that the 13% who had goals were earning, on average, twice as much as the 84% who had no goals at all. And the 3 percent who had clear, written goals with a plan to achieve them were achieving ten times as much as the entire 97% combined.

    Goal setting will increase your chances of arriving successfully at your destination. Remember, always set SMART goals. Goals should be: Specific, Measurable, Attainable, Relevant, and Time-bound!

    Tess was eight years old. Her little brother Andrew was very sick and their parents were completely out of money. She heard Daddy say to her tearful Mother, "Only a miracle can save him now."

    Tess took her money and made her way six blocks to Rexall's Drug Store.

    "And what do you want?" the chemist asked in an annoyed tone of voice. "I'm talking to my brother from Chicago whom I haven't seen for ages."

    "Well, I want to talk to you about my brother," Tess answered back in the same annoyed tone. "He's really sick. He has something bad growing inside his head and my Daddy says only a miracle can save him now. So how much does a miracle cost?"

    "We don't sell miracles here, little girl. I'm sorry but I can't help you," the chemist said, softening a little.

    "Listen, I can help you." The chemist's brother was a well-dressed man. He asked Tess, "What kind of miracle does your brother need?"

    "I don't know," Tess replied. "Mommy says he needs an operation. But my Daddy can't pay for it, so I want to use my money."

    "How much do you have?" asked the man from Chicago. "One dollar and eleven cents," Tess answered. "And it's all the money I have, but I can get some more, if I need to."

    "Well, what a coincidence (巧合)," smiled the man. "A dollar and eleven cents － the exact price of a miracle for your little brother. Take me to where you live. Let's see if 1 have the kind of miracle you need."

    That man was Dr. Carlton Armstrong, a surgeon in neurosurgery (神经外科). The operation was completed without charge and it wasn't long until Andrew was home again and doing well．

    Tess smiled. She knew exactly how much a miracle cost… one dollar and eleven cents… plus the faith of a little child.