Tu Youyou, an 84-year-old female scientist, became the first Chinese to win a Nobel Prize in science on Oct 5. Before that, she ever won the 2011 Lasker Award for finding out artemisinin (Qinghaosu), which saved millions of lives. She was thankful for the Lasker prize, but said, “It is just a scientist' duty. I will go on fighting for the health of all humans.”

    Tu kept her work in the 1960s and 1970s. In that age, Malaria could took away people's health. Scientists all over the world had already tried over 240 000 times but failed. Tu Youyou, a member of the Academy of Traditional Chinese Medicine, Beijing, began to study Chinese herbs.

    Before 2011, people didn't know Tu very much. Many friends played jokes with her “the Professor of Three None's” : no degree, no study experience abroad, not a member of any Chinese national colleges. But she is hard-working. She read a lot of traditional Chinese medicine books and did a lot of researches on the disease.

    In February, 2012, Tu was named National Outstanding Females (One of the Ten) Tu is now a model of Chinese medical workers.

    Barditch High School decided to an All-School Reunion. Over 450 people came to the event. There were tours of the old school building and a picnic at Confederate Park. Several former teachers were on hand to tell stories about the old days. Ms. Mabel Yates, the English teacher for fifty years, was wheeled to the Park.

    Some eyes rolled and there were a few low groans(嘟囔声)when Ms.Yates was about to speak. Many started looking at their watches and coming up with excuses to be anywhere instead of preparing to listen to a lecture from an old woman who had few kind words for her students and made them work harder than all the other teachers combined.

    Then Ms. Yates started to speak:

     “I can't tell you how pleased I am to be here. I haven't seen many of you since your graduation, but I have followed your careers and enjoyed your victories as well as crying for your tragedies. I have a large collection of newspaper photographs of my students. Although I haven't appeared in person, I have attended your college graduations, weddings and even the birth your children, in my imagination.”

    Ms. Yates paused and started crying a bit. Then she continued:

     “It was my belief that if I pushed you as hard as I could, some of you would succeed to please me and others would succeed to annoy me. Regardless of our motives, I can see that you have all been successful in you chosen path.”

     “There is no greater comfort for an educator than to see the end result of his or her years of work. You have all been a great source of pleasure and pride for me and I want you to know I love you all from the bottom of my heart.”

    There was a silence over the crowd for a few seconds and then someone started clapping. Tee clapping turned into cheering, then into a deafening roar(呼喊). Lawyers, truck drivers, bankers and models were rubbing their eyes or crying openly with no shame all because of the words from a long forgotten English teacher from their hometown.

    However exciting space exploration sounds, there's a necessary and important point about it that needs to be considered: food supplies. Right now, astronauts typically rely on dry food in airtight bags and cans, since there are strict weight limits on items taken into space. Foods that we take for granted, such as fresh fruits and vegetables, are out of the question for space explorers.

    For those who've made an effort to try to grow food during space flights, they've faced many difficulties, including the absence of gravity, and a lack of soil, air and humidity (湿度). However, growing food to add and minimize (最小化) the food that must be carried to space will be increasingly important on long-duration flights into space. Great efforts have been made to explore the concept (idea) of space farming. Recently, a team led by Federico Maggi at the University of Sydney in Australia have worked out how plants can absorb nutrients from human urine (尿), as was reported by New Scientist on March 27.

    After over 20 years of experiments, the results suggested that human urine could supply three to four out of the six nutrients that plants need. The researchers also found out that urine-fertilized plants produce no harmful by-products, such as carbon dioxide or ammonia.

    According to New Scientist, human urine is 95 percent water, with the other 5 percent made from nutrients which are harmful to the human body but not to plants. The advantage of this urine-fueled life support system is obvious: By recycling liquid waste and producing food, an efficient cycle will be created.

    And most importantly, said New Scientist，the duration of space flights will be greatly extended to “20 years of flight”, meaning we may be soon sending astronauts on flights to Mars, or even beyond.

    Children exposed to "safe" levels of air pollution in the womb(子宫) develop brain damage that damages their concentration, a study has shown.

    The research is the first too link common pollutants such as nitrogen(氮) dioxide and soot(油烟) to changes in the brains of unborn babies that mean they may struggle to focus at school in later life. The findings suggest that even comparatively clean city air could lead to worse academic performance and an increased risk of mental health problems such as addition or attention deficit hyperactivity disorder(缺陷多动障碍).

    In recent years scientists have found that children who grow up surrounded by air pollution are more likely to have a broad range of "neuro(神经)­developmental" difficulties, including autism and various kinds of cognitive(认知) damage. However, only a handful of studies have looked at the ways in which the poisonous gases and microscopic particles(微粒) that mothers and young children take in affect the brain during critical stages of its growth.

    A group led by Monica Guxens, of the Barcelona Institute for Global Health, found that exposure to air pollution before birth appeared to have slowed the development of several brain regions that play an important role in people's capacity for self­denial and sustained effort. This lack of inhibition could in turn cause "cognitive delays" when the children get older, the scientists argue in Biological Psychiatry.

    "We need this function in our daily life," Dr. Guxens said. "It controls our impulses(冲动) and our selective attention. Children need it to learn and for making decisions in later life. We're interested to see what will happen: is there going to be an impact on their academic work, are there going to be clinical implications? It might be that this will lead to problems later."

    The results were drawn from MRI scans of 873 children between the ages of six and ten in Rotterdam. Even though 99.5 percent of their mothers had lived with nanoparticle pollution levels well below EU legal limits while they were pregnant the pollution still appeared to have taken its toll(伤亡人数).

    Children who had been exposed to more pollution in the womb did worse on a test of their ability to block out irrelevant stimuli(刺激). They also had thinner outer layers in the precuneus(楔前叶) and the rostral middle frontal regions of their brains, both of which are involved in cognitive inhibition, which refers to the mind's ability to tune out stimuli that are irrelevant to the task at hand or to the mind's current state.

    Experiments on animals show that so­called fine particles are able to pass through the placenta and affect the brain of the fetus(胎儿). Dr Guxens said there were probably no such thing as a safe concentration of air pollution.

    In earliest times, men considered lightning to be one of the great mysteries (神秘的事物)of nature. Some ancient peoples believed that lightning and thunder were the weapons (武器) of the gods.

    In reality, lightning is a flow of electricity formed high above the earth. A single flash of lightning 1.6 kilometres long has enough electricity to light one million light bulbs (灯泡).

    The American scientist and statesman, Benjamin Franklin, was the first to show the connection between electricity and lightning in 1752. In the same year he also built the first lightning rod (避雷针). This device (装置物) protects buildings from being damaged by lightning.

    Modern science has discovered that one stroke (闪击) of lightning has a voltage (电压) of more than 15 million volts (伏特). A flash of lightning between a cloud and the earth may be as long as 13 kilometers, and travel at a speed of 30 million meters per second.

    Scientists judge that there are about 2,000 million flashes of lightning per year. Lightning hits the Empire State Building in New York City 30 to 48 times a year. In the United States alone it kills an average (平均数) of one person every day.

    The safest place to be in case of an electrical storm is in a closed car. Outside, one should go to low ground and not get under tress. Also, one should stay out of water and away from metal fences. Inside a house, people should avoid open doorways and windows and not touch wires or metal things.

    With lightning, it is better to be safe than sorry?

Ever since I entered YYHS, I have been struggling with the courses I take, in particular math. Although much effort has been put into math, I can't see any sign of improvement. Every day, I sit in the classroom, looking at the math teacher {#blank#}1{#/blank#}(困惑地). In a sense, I can {#blank#}2{#/blank#}(被称为) an idiot in learning math. Worse still, there are countless unknown fields {#blank#}3{#/blank#}(来探索) in my spare time. Last weekend, we took a math exam and scored only 78, {#blank#}4{#/blank#}(这使我很受挫和绝望). YYHS, originally known as the Eighth School, {#blank#}5{#/blank#}(属于) the list of first provincial key schools in Hubei province. {#blank#}6{#/blank#}(被包围) talented students here, I feel highly pressured all the time. At times, an idea pops up into my mind that I may as well {#blank#}7{#/blank#}(摆脱) this renowned school. How I wish I could learn in a relaxed atmosphere, where I can have my learning schedule {#blank#}8{#/blank#}(调整) a little bit {#blank#}9{#/blank#}（如果可能）. When I shared my idea with my parents the other day, they urged me to {#blank#}10{#/blank#}(抛弃) all my troubles and {#blank#}11{#/blank#}(留心) in each class. Without their support, I had to stay and commit myself to my work. Whatever challenge comes my way, I will face it bravely. Should I fail in the future, I can {#blank#}12{#/blank#}(接管) my family business. After all, just as the saying goes, "All roads lead to Rome."