The sound of a mosquito can mean trouble in many parts of the world. The bite of the mosquito can be deadly. The insects carry serious diseases like malaria (疟疾). It is estimated that almost 630,000 people died from malaria and malaria­related causes in 2012, and most of these cases were in African countries.

    In the United States, a group of California scientists are working to develop a more effective and less costly substance (物质) to protect people from mosquitoes. The researchers are investigating the sense of smell in mosquitoes. They found the insects use the same receptor for identifying carbon dioxide in human breath as they do for the smell of our skin. Anandasankar Ray, who is leading the investigation, says scientists tested more than a million chemical compounds (化合物) until they found a substance called Ethyl Pyruvate. He says Ethyl Pyruvate makes the mosquitoes' receptors inactive. “When we apply Ethyl Pyruvate to a human arm and offer it to hungry mosquitoes in a cage, very few of the mosquitoes are attracted to the human arm because only a few of them are able to smell it out,” said Ray.

    Genevieve Tauxe, a member of the research team, says it was not easy to find the neurons (神经元) of noble cells that recognize both the smell of human breath and skin. “With the device used to examine the mosquito, we are able to insert a very small electrode (电极) into the part of the mosquito's nose, where its smelling neurons are and where the smell is happening,” said Tauxe.

    Anandasankar Ray says a product based on Ethyl Pyruvate may cost less to produce than DEFT, the most effective chemical treatment now in use. He says DEFT is too costly for most people who live in areas affected by malaria.

    “Perhaps by finding smells that can attack other target receptors, we will be able to improve upon DEFT and finally have the next generation of insect behaviour control products,” said Ray.

    It may not be as easy as you think to build a foundation for your child of family values. Often we believe that our child will pick up on our values if they live in the same home. While they may pick up many of our values, parents need to remember they are not the only influence in their child's life. These outside values often compete with family values for your child's attention. If we do not make a conscious effort to instill our values into our children, they may not get instilled at all.

    I wish I had learned that lesson a little earlier. I thought if I lived my values for my children they would pick them up and make their own. Sometimes this happened and sometimes it didn't. I often see twenty-something “kids” who have no faith in many of the values of their family in favor of the values of their friends. Children will often pick up the negative you show quicker than the positive, so the positive things need extra focus to set them.

    Some of the influences your children face every day include their church, their school, their friends, any clubs or sporting groups they are part of and more. Kids spend many hours a day at school and with their friends. Sometimes in the business of life, we suppose our children will obtain that foundation we want for them.

    Instilling a foundation of family values to sustain(维持) your child requires more than living it in front of them. That is important, but building up your child with this important foundation must become intentional.

    That means we plan times to gather as a family. We plan activities together that show the values we want to pass on. We talk about our values; we live our values; we discuss the values of others and how they differ from ours; we constantly look for opportunities and make our own opportunities to share these values in word or deed with our children.

    Family values give our children a foundation to build upon. It helps them know they are loved and gives them a sense of belongings. Upon this sure foundation, they can spread their wings and grow to become parents who share these same values with their own children.

    Peng Liyuan, wife of President Xi Jinping, has drawn extensive attention from people both at home and abroad for her charisma and grace. Accompanying her husband on his first overseas trip after becoming president, Peng Liyuan exhibited graceful demeanor, a pleasant personality and well-chosen dress, prompting people to coin the term “Liyuan style”.

Peng Liyuan, as one of China's best-known singers, was popular among Chinese people long before her husband became the president. Loved by her fans, she has been in touch with the people for years.

    “Liyuan style” is not only representative of a fashion idol, but also overpass cultural and diplomatic barriers. The beautiful handbags Peng has carried, and the plain but elegant and delicate dresses she has worn have become popular. Her choice of clothing, made-in-China instead of luxurious foreign brands, shows her belief in domestic dress designs.

But “Liyuan style” is not only about clothing and a woman's paraphernalia. It is also about diplomacy and promoting China's soft power. In Moscow, Peng visited a boarding school for orphans and children estranged (疏远) from their parents, encouraging them to strive for a better life, which brought out the maternal side of her character. In Tanzania, she donated sewing machines and school bags to women and children. And as a World Health Organization ambassador in the fight against AIDS, Peng is devoted to many public causes, including those relating to charity and healthcare.

    Some observers have already started saying that Peng's activities have become part of public diplomacy in China.

Also, “Liyuan style” has boosted the confidence of the Chinese people. Modem but not flashy, elegant but not arrogant, Peng has all the virtues of a Chinese woman and carries them to the international stage.

Since the 18th Party Congress and the annual sessions of the NPC and CPPCC, the country's new leadership has vowed to adopt a down-to-earth work style to connect with the people. Peng's plain but elegant style shows that thriftiness and an earthy style need not be drab and boring.

    So it can be said that Peng's first appearance on the international stage has kicked off well.

    A new study shows students who write notes by hand during lectures perform better on exams than those who use laptops(笔记本电脑)．

    Students are increasingly using laptops for note­taking because of speed and legibility(清晰度)．But the research has found laptop users are less able to remember and apply the concepts they have been taught.

    Researchers performed experiments that aimed to find out whether using a laptop increased the tendency to make notes “mindlessly” by taking down word for word what the professors said.

    In the first experiment，students were given either a laptop or pen and paper. They listened to the same lectures and were told to use their usual note­taking skills. Thirty minutes after the talk，they were examined on their ability to remember facts and on how well they understood concepts.

    The researchers found that laptop users took twice as many notes as those who wrote by hand. However，the typists performed worse at remembering and applying the concepts. Both groups scored similarly when it came to memorizing facts.

    The researchers' report said，“While more notes are beneficial，if the notes are taken mindlessly，as is more likely the case on a laptop，the benefit disappears.”

    In another experiment aimed at testing long­term memory，students took notes as before but were tested a week after the lecture. This time，the students who wrote notes by hand performed significantly better on the exam.

    These two experiments suggest that handwritten notes are not only better for immediate learning and understanding，but that they also lead to superior revision in the future.

    Are you suffering from FOMO—that is, Fear of Missing Out? Research shows that a growing number of young people are with worrying reasons for their sleep and schoolwork.

    {#blank#}1{#/blank#}You aren't able to do your best unless you sleep well. Most experts agree that the optimum（最适宜）number of hours is eight, and this has been accepted as common sense for as long as I can remember. However, I was young once and know most of you get much less sleep than that.

    I read an interesting article in a teachers' magazine recently.{#blank#}2{#/blank#} Worryingly, the results showed that teenagers are facing a new problem. They may go to bed and get up at appropriate times, but a growing number are waking up in the middle of the night, not to use the bathroom or have a snack, but because of FOMO.

    According to the article, the number of students waking up during the night to check social media is growing. Afraid of missing a comment or opportunity to take part in a chat, teenagers are waking at all times of the night, going online and getting involved. {#blank#}3{#/blank#}

    Experts are worried about this growing trend and the report reveals some worrying statistics: 23% of 12 to 15-year-olds wake up nearly every night to use social media. {#blank#}4{#/blank#} One in third of the students are constantly tired and unable to function to their full capacity.

    So I'd like to ask you to be responsible when it comes to social media. Switch off your devices at night. The world won't end and your social media will be waiting to greet you in the morning! {#blank#}5{#/blank#}

A. But things are getting out of hand.

B. I give you my word that you won't have missed anything important.

C. Another 15% wake up at night once a week for the same reason.

D. They did a study of 848 students in Wales.

E. FOMO is the fear that everyone else is having more fun and more excitement than you.

F. All happens when they should be sound asleep.

G. Everybody knows how important it is for students to get a good night's sleep every night.

    Climate change is perhaps the key issue of our time. Often, however, it is presented to us as being so abstract that it seems impossibly distant. For those of you looking for something a little more concrete, a new report suggests that the effects of climate change may significantly affect coffee.

    The report, put out by The Climate Institute, describes the effects of climate change on various coffee-growing nations and the resultant effects on the plants and those who grow them.

    Coffee Arabica plants, which produce 70% of all commercial coffee, can be adversely affected by even a half-degree change in typical weather conditions. This sensitivity to temperature puts the plant at increased risk of the effects of climate change.

    In Central America the average temperature has risen by a full degree Celsius since 1960. In Ethiopia the average temperature has increased by 1. 3 degrees. This increase is enough to have notable effects on the plants. In Tanzania the productivity per hectare of coffee has fallen by half since the 1960s due to changes in temperature.

    Indeed, studies claim that by 2050 the area of the world suitable for growing coffee will be cut by half. Coffee production is likely to then be pushed to higher elevations (海拔) to take advantage of lower temperatures, but this will not be enough to make up for lost lowland areas.

    Coffee is the second most traded goods by developing nations, and the inability of producer nations to export it could cause dramatic chain reactions in their economies. Millions of people make a living in the production, processing, transport, and sale of coffee; their livelihoods would stand to take a blow as growing areas decrease and prices rise.

    As the temperature keeps rising, your cup of coffee will become much more expensive, and it may also carry an aftertaste bitterer than usual, for all those workers in the coffee belt left without the means to make a living as conditions worsen. Not only that, but the economic effects will cost the West millions in increased foreign aid.