Experiments under way in several labs aim to create beneficial types of genetically modified foods, including starchier potatoes and caffeine-free coffee beans. Genetic engineers are even trying to transfer genes from a cold-winter fish to make a frost-resistant tomato.

    A low-sugar GM strawberry now in the works might one day allow people with health problems such as diabetes (糖尿病) to enjoy the little delicious red fruits again. GM beans and grains rich in protein(蛋白质) might help people at risk of developing kwashiorkor. Kwashiorkor, a disease caused by severe lack of protein, is common in parts of the world where there are severe food shortages.

    Commenting on GM foods, Jonathon Jones, a British researcher, said: "The future benefits will be enormous（巨大的）, and the best is yet to come". To some people, GM foods are no different from unmodified foods. "A tomato is a tomato," said Brian Sansoni, an American food manufacturer.

    Critics of GM foods challenge Sansoni's opinion. They worry about the harm that GM crops might do to people, other animals, and plants.

    In a recent lab study conducted at Cornell University, scientists tested pollen(花粉) made by BT corn, which makes up one-fourth of the U.S. corn crop. The scientist dropped the pollen onto milkweed, a plant that is the only known food source of a butterfly caterpillar(毛虫). Within four days of feeding on the leaves, almost half of a test group of caterpillars died. "This is a warning bell." said Cornell researcher Linda Raynor.

    Some insects that are not killed by GM foods might find themselves made stronger. How so? The insecticides are used on the crops to kill the pests. But GM plants produce a continuous level of insecticide. Insects relying on those crops may develop resistance to the plants and they may also develop a resistance to the insecticide.

    At the forum on GM food held last year in Canada. GM crops that have been made resistant to the herbicide might crossbreed with wild plants, creating "superweeds" that could take over whole fields.

    So where do you stand? Should GM food be banned in the United States, as they are in parts of Europe? Or do their benefits outweigh（胜过） any of the risks they might carry?

    For as long as I can remember, I've always wanted a personal motto. I wanted a saying that I could really try to live my life by. I mean all the humorous book and storybook heroes always have a personal principle they follow. Good manners! Courage! Keenness! But a part of me could never get myself to create my own motto because I never knew where to start and I never thought I could give one.

    “With great power comes great responsibility.” is a quote by the great writer and philosopher, Voltaire. More familiar, it makes an appearance in the modern day movie performance of the superhero Spider-Man. This saying provides a sense of responsibility for those with actually limitless power.

    “Be good to others and others will be good to you.” is another well-known proverb that has roots in almost all of the major religions. Although it is less practiced today than it is lectured, it is a powerful and good motto to live by. Kindness, in this sense, is the final power in judging every action.

    My personal motto today has an idea – being efficient. Through my limited knowledge, I have come to find that this is simply the best way for me to give insight about who I am and what I believe in.

 Efficiency is a quality that everyone desires for, right? Who doesn't want to be able to not only work fast but to achieve great results? To some, it may appear to be a frightening journey. But to me, it means that I have a lifelong journey to improve the methods and ideas with which I come near my tasks.

    Regardless of what motto you want to live by, I believe that everyone should have one, or two or more. These are all symbols of a perfect story of us, in our own view. And it immediately provides insight to the type of person we were, we are and what we strive to be. We are never meant to be perfect, but it is important to try and live by a belief that will help us reach our potential. All you have to do is know what your excitement is and live by it.

    A new camera made by a company named Netatmo has facial recognition software(识别系统)that can tell parents at work that their children have returned from school, or that a package has been taken to their home. It can also tell them if a stranger has entered their home.

    Janina Mattausch is a product marketing manager for Netatmo.

    “The common security(安全)cameras at present are not that smart. So, they can tell you if something is moving but they don't necessarily know if it's a human being or, ah, if it's your kids—they don't' know the difference, so they will warn you all the time.”

    When family members enter a home,  the new camera "recognizes" (识别 )  them and sends information to the owner's smartphone. The owner can choose to see the video then or later.  But if an unknown person enters a home, the camera will send the owner a warning that will cause an alarm to sound on the owner's smartphone.

    That is what happened recently to a smart home camera owner named Darrmen. He lives in Paris.

    "On a Friday I was at work, attending a big monthly meeting when my phone warned. At first I told myself 'Oh, it must be a mistake, maybe I have to set the system again. “But the notice on my phone was telling me that there was a movement in my flat and also a face that the software did not recognize.”

    He watched the video and was very surprised by what he saw.

    "I saw a person I did not know with his shoes on. I was watching it live on video. So I felt totally unbelievable, frozen. I asked a workmate to take me back home as fast as possible and I called the police on the way. "

    With the help of the video,  the police found the intruder (闯入者) later that day.

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    Tulou, the special residential architecture of Fujian Province was included on the UNESCO's World Heritage List during the 32nd session of the World Heritage Committee in Quebec, Canada.

    In the fourth century, Han Chinese living in the Central Plains area began to migrate south, gradually gathering in Fujian and forming the Hakka communities. As a defence against enemies, the Hakkas chose to live in compact (紧凑的) communities, and the tulou was their preferred houses. Tens of thousands of such earthen structures were constructed in Fujian Province.

    Most tulous are to be found in the valleys, surrounded by high mountains, and some are in the depths of the great mountains. Most are three to four storeys high, and look like circular blockhouses (堡垒). Rooms on the first floor are used as kitchens, rooms on the second floor are used as barns (谷仓), and rooms on the third and fourth floors are for bedrooms and living rooms. For defensive purposes, the rooms on the first floor have no windows.

    Raw materials for the tulou were obtained locally. Their main building material was a mixture of clay, sand, lime and water, and egg whites, brown sugar and rice water were added as adhesive agents (粘合剂). It was then mixed to form the walls. Once they dried, the walls were so hard that driving a nail into them would have been difficult. Fir branches, which are extremely strong and do not rot, were used to strengthen them, and many centuries later they have remained their original look.

    Tulous are located in a region where earthquakes happen frequently, and their circular construction helps them resist the regular shocks.

    The proven design even inspired one famous Peruvian architect, who paid several visits to Yongding, to build a tulou back home. Not long after, an earthquake struck only 10 kilometers away, and while all the houses around the earthen building fell down, his tulou remained.

    As we drove along, my spirits went up again, and I turned, with pleasure, to the thought of the new life which I was entering. But though it was not far past the middle of September, the heavy clouds and strong north-easterly wind combined to make the day extremely cold; and the journey seemed a very long one, so that it was nearly one o'clock before we reached the place of our destination. Yet when we entered the gateway, my heart failed me, and I wished it were a mile or two farther off. For the first time in my life I must stand alone: there was no retreating now. I must enter that house, and introduce myself among its strange people. But how was it to be done? True, I was near nineteen; but, thanks to the protecting care of my mother and sister, I well knew that many a girl of fifteen, or under, was gifted with a more womanly address, and greater ease and self-possession, than I was. Yet, anyway. I would do very well, after all; and the children, of course, I should soon be at ease with them.

    "Be calm, be calm, whatever happens," I said within myself; and truly I was so fully occupied in steadying my nerves and keeping down the rebellious beat of my heart that when I was admitted into the hall and into the presence of Mrs. Bloomfield, I almost forgot to answer her polite greeting; and it afterwards struck me that the little I did say was spoken in the tone of one half-dead or half-asleep.

    With due politeness, however, she showed me my bedroom, and left me there to take a little refreshment for a little while and led me into the dining-room. Some beefsteaks and potatoes were set before me; and while I dined upon these, she sat opposite, watching me (as I thought) and trying to keep something like a conversation— consisting chiefly of commonplace remarks. In fact, my attention was almost wholly absorbed in my dinner: not from appetite, but from the toughness of the beefsteaks, and the numbness of my hands.

    “I have had so little time to attend to their education myself, but I think they are clever children, and very willing to learn, especially the little boy; he is, I think, the flower of the flock— a generous, noble-spirited boy, one to be led, but not driven, and remarkable for always speaking the truth.” “His sister Mary Ann will require watching,” continued she, “but she is a very good girl on the whole, though I wish her to be kept out of the nursery as much as possible, as she is now almost six years old, and might acquire bad habits from the nurses. I have ordered her bed to be placed in your room, and if you will be so kind as to look after her washing and dressing, and take charge of her clothes, she needs to have nothing further to do with the nursery maid.”

    I replied I was quite willing to do so; and at that moment the children entered the room. Tom Bloomfield was a well-grown boy of seven. Mary was a tall girl, for her age of six, somewhat dark like her mother. The second sister was Fanny, a very pretty little girl, looking little younger than Mary. The remaining one was Harriet, a little broad, fat, merry, playful thing of scarcely two, whom I had more desire for than all the rest — but with her I had nothing to do.