【推荐2】In Vietnamese, Ngan's name means “star,” but she wasn't able to smile brightly because she was born with a cleft (兔唇) condition.

Ngan's family lives in a small, isolated village in southern Vietnam. Without help, her family would never have been able to afford the reconstructive surgery that would change Ngan's lite and give her a brighter future. But when Ngan's parents heard that Operation Smile was conducting a surgical mission in Danang, they did everything in their power to take Ngan there for medical mission. Ngan and her family travelled more than 200 miles for the chance to give her a new smile. Ngan received life-changing surgery on her cleft lip and palate and now, 10 years later, she is a happy, healthy, lively girl-with a smile that shows it.

Before she had surgery, Ngan's facial condition prevented her social engagement and even her involvement in school. Now, with the confidence she gained from her new smile, Ngan can reach her full potential.

Ngan's parents say they had given up everything but hope before Operation Smile gave their daughter the chance to see her dreams become a reality. “Many families in our province will abandon their child if a baby is born with a cleft,” Ngan's father said.

He never wants this to happen, knowing how incredible the transformation is with a free surgery through Operation Smile. Ngan's parents now actively refer to other families of children born with cleft conditions to Operation Smile. They are determined to ensure that every child has the opportunity for a brighter future, regardless of their appearances.

Operation Smile has provided hundreds of thousands of safe surgeries for those born with cleft conditions worldwide. If you would like additional information please visit www. operationsmile. org. uk/Star, call 020 3475 5126 or write to Operation Smile UK, Genos House, Juniper Drive, London SW18 1FY.

【推荐3】There have been so many improvements in detecting cancer from blood tests to virtual devices that can detect tumors(瘤) painlessly. Now, a new visual technology will allow doctors to detect skin cancers in just 10 seconds.

Researchers from Tel Aviv University (TAU) have come up with a new visual technology that can find out skin cancer without ever cutting into the patient’s body. Skin cancer detection has always been a long process of doing a traditional examination of harmful changes and then waiting for the results. But this new method is so fast that you can know the results instantly.

Early detection of melanomas (a kind of tumors) can save lives according to the researchers. If a melanoma is detected early, and removed right away, the chances for a full recovery are very good. This new technology is built upon the knowledge that harmful changes give off different colors when placed under special light that shows if they are fatal (致命的)and what type of cancer is present. Instead of removing the harmful changes for examination, the research team pioneered a way to check them on the body.

The research was published in the journal Medical Physics, saying the optical technology was tested on 90 patients and it accurately identified the 5 patients with melanoma and 10 with other skin cancers. In addition, 75 other patients that had harmful changes were correctly identified as cancer-free.

The next stage involves testing the technology on many more patients in the hope that it can be used to create an easy-to-use machine that will be able to find out harmful changes on a screen. The visual technology will have the potential to cause an immense change in the field of detecting and treating skin cancer, which increases survivability and the quality of life.

【推荐1】A wise driver keeps an eye on the fuel indicator (指示器), to make timely stops at filling stations. For drivers of electric cars, though, those stations are scarce. The facility needed for refilling batteries has yet to be developed, and the technology that facility will use is still not available at the moment. Most electric cars are equipped with plugs. But plugs and their connected cables and charging points bring problems. The cables are easy to trip passers-by. The charging points lead to more street jams. And the copper wire involved attracts thieves easily. Many engineers would, therefore, like to develop a second way of charging electric cars—one that is wireless and can thus be buried underground.

Electromagnetic induction (电磁感应), the fundamental principle behind wireless charging, was discovered by Michael Faraday in 1831, and is widely used in things such as electric motors and generators. Faraday observed that moving a conductor through a magnetic field generated a current in that conductor. Further investigations showed that this also works if the conductor is fixed and the magnetic field is moving. Since electric currents generate magnetic fields, and if the current changes so does the field, a changing current creates a field that is constantly moving. This means that running such a current through a conductor will generate a similar current in another, nearby, conductor. That generated current can then be used for whatever purpose an engineer chooses.

In the case of electric car charging, the first conductor is a length of copper wire. This is rolled up around a piece of ferrite (铁氧体) that strengthens the magnetic field generated. The whole device is packed in a flat case that can be easily buried underground. When a car equipped with a suitable “pickup” stops or parks above this device, and changing current is fed into it, a similar current is generated in the pickup. This is then turned into direct current, and is used to charge the car’s battery. The principle is thus pretty simple. But only in recent years has it become practical to use in electric cars.

【推荐1】Are you expecting some hottest books? Here are 4 best-sellers popular with teenagers.

Cuba in My Pocket

Cuba in My Pocket follows 12-year-old Cumba from Cuba to America in the 1960s. After being sent to a new country, Cumba must find his footing in unfamiliar surroundings. Over time, he learns how to trust others and get over difficulties with the great help of the locals.

Author Cuevas bases the story on her dad’s experiences. For Cuevas, hope is an important theme in Cuba in My Pocket.

Fast Pitch

In Stone’s Fast Pitch, Shenice is captain (队长) of the Fulton Firebirds. She decides to make her softball team become the winner in the final. But she loses focus after learning a family secret. Can Shenice find out her family secret and still lead her team to victory? She makes it. She fights with her team and they get the final victory.

Ivy + Bean Get to Work

Annie Barrows is the author of Ivy + Bean Get to Work. Ivy and Bean are best friends. They attend a Career Fair at school. They learn about jobs adults can have. But the girls are interested in just one job: Searching for treasure! The two look for gold. But they can’t find it. Barrows hopes kids will feel relaxed about themselves when reading this book.

A Shot in the Arm!

A Shot in the Arm!, by Don Brown, is a graphic (绘图) novel about the history of vaccines (疫苗). Readers learn how vaccines have been used throughout history to fight illness. The author also praised those who worked hard for the development of vaccines. A Shot in the Arm! isn’t a boring history book. Instead, it’s an exciting read that uses colorful drawings to pull readers in.

【推荐3】A warmer global climate will certainly mean more than just more sweat! It may, for example, change wind and rain patterns and it may lead to rising sea levels. These changes will affect plant and animal life as well as human health. The future climate will be determined partly by how many greenhouse gases are emitted (散发). The Intergovernmental Panel on Climate Change (IPCC) has identified (识别) how much we can expect the climate to change. According to the IPCC, if we don t take action to limit emissions of greenhouse gases, by 2100 we can expect the mean surface temperature to increase by (1.4-58C) compared to 1990 the sea level to rise between 9 and 88 cm 5-20% more rain and snow.

The reason why scientists do not know whether the temperature will increase by a little more than one degree or up to six degrees is that, first, they do not know how many greenhouse gases will be emitted in the future, and second it is still uncertain how sensitive (敏感的) the climate on Earth is to emissions of greenhouse gases.

Moreover, the above figures are averages (平均值) for the entire planet. This means that some places may become much warmer, while others may change little, or even become cooler. But the degree of climate change that a certain country faces has little to do with how many greenhouses gases have been emitted. Greenhouse gases are well mixed with the other gases in the air. After they are emitted, they do not stay in the same place, but spread throughout the atmosphere. Once they are there they stay a long time. This is why it is not true that the biggest emitters will suffer the biggest climate changes. The most serious results of an increased greenhouse effect are just as likely to show up in places far away from where the emissions began.