When a leafy plant is under attack ，it doesn't sit quietly. Back in 1983, two scientists, Jack Schultz and Ian Baldwin,reported that young maple trees getting bitten by insects send out a particular smell that neighboring plants can get. These chemicals come from the injured parts of the plant and seem to be an alarm.What the plants pump through the air is a mixture of chemicals known as volatile organic compounds,VOCs for short.

Scientists have found that all kinds of plants give out VOCs when being attacked .It's a plant's way of crying out.But is anyone listening?Apparently.Because we can watch the neighbours react.

    Some plants pump out smelly chemicals to keep insects away.But others do double duty .They pump out perfumes designed to attract different insects who are natural enemies to the attackers. Once they arrive, the tables are turned. The attacker who was lunching now becomes lunch.

    In study after study,it appears that these chemical conversations help the neighbors .The damage is usually more serious on the first plant,but the neighbors ,relatively speaking ,stay safer because they heard the alarm and knew what to do.

Does this mean that plants talk to each other? Scientists don't know. Maybe the first plant just made a cry of pain or was sending a message to its own branches, and so, in effect, was talking to itself. Perhaps the neighbors just happened to “overhear” the cry. So information was exchanged, but it wasn't a true, intentional back and forth.

    Charles Darwin, over 150 years ago, imagined a world far busier, noisier and more intimate(亲密的) than the world we can see and hear. Our senses are weak. There's a whole lot going on.

                                                                      How I Turned to Be Optimistic

    I began to grow up that winter night when my parents and I were returning from my aunt's house, and my mother said that we might soon be leaving for America. We were on the bus then. I was crying, and some people on the bus were turning around to look at me. I remember that I could not bear the thought of never hearing again the radio program for school children to which I listened every morning.

    I do not remember myself crying for this reason again. In fact, I think I cried very little when I was saying goodbye to my friends and relatives. When we were leaving I thought about all the places I was going to see—the strange and magical places I had known only from books and pictures. The country I was leaving never to come back was hardly in my head then.

    The four years that followed taught me the importance of optimism (乐观), but the idea did not come to me at once. For the first two years in New York I was really lost-having to study in three schools as a result of family moves. I did not quite know what I was or what I should be. Mother remarried, and things became even more complex (复杂的) for me. Some time passed before my stepfather and I got used to each other. I was often sad, and saw no end to “the hard times.”

    My responsibilities in the family increased a lot since I knew English better than everyone else at home. I wrote letters, filled out forms, translated at interviews with Immigration officers, took my grandparents to the doctor and translated there, and even discussed telephone bills with company representatives.

    From my experiences I have learned one important rule: almost all common troubles finally go away! Something good is certain to happen in the end when you do not give up, and just wait a little! I believe that my life will turn out all right, even though it will not be that easy.

    The Metropolis Book Club

    Membership

    All you need to do is fill out the order form at the bottom of the page, select your first order from our book list and then post the completed form back to us.

    Special offers for new members

    As a special offer, you may choose any reduced-price books from our new members' book list, to the value of 100 yuan in total. Tick the box on your form to order a free watch. Join before the end of this month and you receive another free book carefully chosen by our staff. Order an audio-book from the many on offer, at half the recommended retail price.

    When you've joined

    As a member you get around 50% off the publisher's price of every book you buy, and what's more, they come straight to your door. Your free club magazine arrives once a month to keep you up to date with the latest best-sellers we've added to our list. On the Internet, you can find all our titles for the year at our exclusive members' website. Our website also has a book swap service where members can request or offer books for exchange.

    Being a member

    All you have to do is order four books during your first year. After that, you can decide on the number of books you wish to take. In each of your monthly club magazines, our experienced staff choose a “Book of the Month” for you, which is offered at an extra-special price. If you do not want this book, just say so in the space provided on the form and send it back to us. We always send the book if we do not receive this form.

    Once we receive your order, your books are delivered within one week. And remember, you have up to a fortnight to decide if you wish to keep the books you have ordered. If they aren't what you expected just send them back!

    Chewing gum(口香糖) has its origins in ancient times from Mayans to Greeks who would chew the resin(树脂)of certain trees for medical purposes and maybe even for freshening breath. The history of chewing gum continued as Native Americans introduced it to European settlers.

    Chewing gum hit the market after Santa Anna brought a case of chicle(糖胶树脂) from Mexico to New York. Santa Anna gave some to the part-time inventor Thomas Adams Thomas Adams changed the gum and marketed it as a candy. The invention took off and was known as Chiclets.

    In 1900 Frank Fleer coate chewing gum with sugar, and in 1906 Blibber Blubber was invented, but never made it to market. Blibber Blubber was too sticky and it was also too difficult to remove the burst bubble(破了的泡泡) from one's skin without using some special tools.

    A history of bubblegum just wouldn't be complete without mentioning the gumball machine, which popularized gum. The first gumball machine came onto the scene in 1907 and sold sugar-coated chewing gum.

    However, it wasn't until 1928 that bubblegum was created. Walter Diemer, working for Frank Fleer's gum company, discovered bubblegum by accident while experimenting in the lab during his breaks. The gum was named Dubble Bubble. Pink was the only color which could be used at the time, and Dubble Bubble has remained pink ever since.

    According to the International Chewing Gum Association,during WWII Dubble Bubble was handed out by US military members as gifts, thereby spreading its popularity among the peoples of Europe, Africa, and Asia. And in the 1930s he first bubblegum cards appeared. "the pictures changed from war heroes to Wild West figures to professional athletes."

    Bubblegum has been popular ever since, especially among children, thanks to its inventive shapes, and sugary flavors, from original bubblegum to a yardstick of fruity bubblegum.

    On one occasion, while visiting my parents, I happened to meet the little boy who lived next door. It was obvious that his mother had told him not to come over uninvited. He was standing on the very edge of his yard with an anxious look on his face, seemingly about to burst.

    My father waved him over and performed the introductions. "Eliot, this is my son, Gary. Gary, meet my little friend, Eliot." To my delight, he reached out his small hand and I accepted the formality(遵守礼节) with a smile.

    Unlike most children, this teenager was not shy of meeting a stranger. As a matter of fact, he turned out to be quite a chatterbox. Eliot had me laughing as I listened to the excitement in his voice. for, as you know, it was a big deal to find a toad (蟾蜍)! His descriptions were priceless as I asked the obvious questions concerning the capture(捕捉). He was pleased that I showed interest in his adventure and gladly explained its details.

    Since Eliot seemed so willing to invest in our budding friendship, I asked him a question, "Do you like banjo music?" He got very excited and answered me with a hearty "Yes!"

    I took out my banjo from the car, but when I sat next to him and started playing, Eliot looked at me with a puzzled expression. He asked me "What's that?" in all seriousness.

    My dad and I smiled. The boy who just "loved" the banjo didn't recognize that I was holding one and that what I was playing was "banjo music".

    I realized that his heart was in the right place. Eliot just wanted to please his new friend with that "Yes", thinking it was what I wanted to hear.

    Well anyway...Eliot likes the banjo for real now. And I like Eliot.