First Lady Michelle Obama is on a five-day trip to Asia. She is visiting Japan and Cambodia to help publicize a program called "Let Girls Learn". Administration officials set up the campaign to support the education of millions of girls worldwide.

    Before her trip, Mrs. Obama and her husband noted the inability of an estimated 62-million girls to attend school. They said educating the girls should be a foreign policy goal.

    This week, Mrs. Obama criticized the fact that tens of millions of girls are not receiving a satisfactory education. In her opinion piece, she wrote this failure to educate girls it was more than "a tragic waste of potential." It is both a serious public health issue and a problem for the economic health of nations and the world. She also said it was "a threat to the security of countries around the world".

    The First Lady noted by 2012, every part of the developing world was educating both girls and boys in primary schools. But this is not the case in secondary education. She wrote in some areas girls face "the cultural values and practices that limit the prospects of women in their societies ".

    The Obama administration launched the "Let Girls Learn" campaign earlier this month. At the time, Mrs. Obama noted plans to involve the U.S. Peace Corps, and the Volunteer Development Agency.

    "This effort will draw on the talent and energy of the nearly 7,000 Peace Corps volunteers serving in more than 60 countries. Through this effort, Peace Corps will be supporting hundreds of new community projects to help girls go to school and stay in school. And, I want to emphasize that these programs will be community-generated and community-led. They will be based on solutions devised by local leaders, families and yes, even the girls themselves."

    President Obama also spoke at the same White House event, saying that campaign is important to his administration.

    Most of us will be familiar with the traditional talent show set-up: thousands of hopefuls line up outside the audition（试音）room, wait for hours to go in and perform for a group of judges. Then these potential pop stars could be lucky and get through to the next round, or they might hear the command, "Sorry, it's a no from me. But what do the judges actually bring to a talent show?

    Music talent show judges attract millions of viewers each week to their programs. As public figures, they play an important part in advertising campaigns for these programs. They often receive high salaries and can be moody. Are they really worth the expenses and difficulties that they cause? One solution might be to replace them with computers.

    Can computers really match human judges? Scientist Dr Nick Collins and his team at the University of Sussex think they can. Dr Collins has been working on a project that involves programming three computerized judges that he says would be far more consistent in their judgment of musical performances. Employing a special programming language, Dr Collins's digital judges can be trained up by "listening" to particular musical styles. After they have been listening for a while, the programming language allows these judges to spot the specific features of the music, including the voice quality, the rhythm etc. Collins says, “The judges' listening capacity is not yet as good as a human ear, but they won't be as moody as some human reality TV show judges.”

    Maybe that is the problem with this electronic musical innovation. Real human judges on talent shows interest us with their personality, decisions and catchy phrases. Will a computer program be able to do the same?

    Students in a college French class have helped fill the empty bookshelves of a very poor Haitian(海地的) school by writing 90 books. Although many children in Haiti speak Creole(克里奥尔语) at home, French is taught in classrooms and used by the government , and students are asked to know the language in order to get further education. Therefore, the class hoped to provide resources to help the young students learn French well.

    The project, called Little French Books, was headed up by Jennifer Shotwell, a French professor at Randolph-Macon College in Ashland, Virginia. Shotwell had visited Haiti with a group of students in 2013 to support a Haitian student and give books to a new library. Following the trip, Shotwell brought the experience back to her classroom.

    "My students have a chance to use the French language in a special way by writing children's books," Shotwell said. "Though some learners don't think they can produce much with a new language, my students are learning to express themselves and create entertaining stories that we finally share with disadvantaged children who are also learning French."

    Shotwell had sent French books to Haitian schools, but they were printed on cheap paper that could be easily broken. So she started a Kickstarter, which collected more than $1,000 to make books with durable covers.

    The books, which included stories about princesses, dinosaurs and exciting experiences, were given to the St.Gabriel's school in Lascahobas.

    "Each time a child gets into a new book, he will no doubt get new knowledge and new understanding. The Little French Books means a lot to our students, said Gardy Myrtil, a teacher at the school.

    As we know, earthquakes can bring people much fear. There are some places that have few or no earthquakes. Most places in the world, however, have them regularly. Countries that have a lot of earthquakes are usually quite mountainous.

    The most talked about earthquake in the United States was in San Francisco in 1906. Over 700 people died in it. The strongest one in North America was in 1964. It happened in Alaska.

    Strong earthquakes are not always the ones that kill the most people. In 1755, one of the strongest earthquakes ever recorded was felt in Portugal. Around 2,000 people died.

    In 1923, a very strong earthquake hit Tokyo, Yokohama area of Japan. A hundred and forty thousand people died. Most of them died in fires which followed the earthquake.

    One of the worst earthquakes ever was in China in 2008. It killed a large number of people. The worst earthquake ever reported was also in China, in which 400,000 people were killed or injured. This earthquake happened in 1556.

    Earthquakes worry people a lot. The reason is that we often do not know when they are coming. People cannot prepare for earthquakes.

    In 1800, only three percent of the world's population lived in cities. Only one city — Beijing — had a population of over a million. Most people lived in rural areas, and never saw a city in their lives. In 1900, just a hundred years later, roughly 150 million people lived in cities, and the world's ten largest cities all had populations exceeding one million. By 2000, the number of city dwellers exceeded three billion; and in 2008, the world's population crossed a tipping point — more than half of the people on Earth lived in cities. By 2050, that could increase to over two-thirds. Clearly, humans have become an urban species.

    In the 19th and early 20th centuries, many people viewed cities negatively — crowded, dirty environments full of disease and crime. They feared that as cities got bigger, living conditions would worsen. In recent decades, however, attitudes have changed. Many experts now think urbanization (城市化) is good news, offering solutions to the problems of Earth's growing population.

    Harvard economist Edward Glaeser, author of The Victory of the Cir, is one such person. Glaeser argues that cities are very productive because "the absence of space between people" reduces the cost of transporting goods, people, and ideas. While the flow of goods has always been important to cities, what is most important today is the flow of ideas. Successful cities enable people to learn from each other easily, and attract and reward smart people with higher wages.

    Another urbanization supporter is environmentalist Stewart Brand. Brand believes cities help the environment because they allow haft of the world's population to live on about four percent of the land. This leaves more space for open country, such as farmland. City dwellers also have less impact per person on the environment than people in the countryside. Their roads, sewers, and power lines need fewer resources to build and operate. City apartments require less energy to heat, cool, and light. Most importantly, people in cities drive less so they produce fewer greenhouse gases per person.

    So it's a mistake to see urbanization as evil; it's a natural part of development  The challenge is how to manage the growth.

The Ebola virus is an infectious disease that for years had almost no treatments, and it kill s about half the people it infects. Now a new study published in The Lancet Infectious Diseases shows that a promising vaccine （疫苗）, named rVSV△G-ZEBOV-GP, doesn't just help to reduce infections, it also can cut those death numbers in half.

The vaccine is a single-dose （单剂） muscular one that causes cells to produce one of the virus's proteins. "Later, if the person is exposed to Ebola,"explains Rebecca Coulborn, a scientist with Epicentre, the medical research arm of Doctors Without Borders, "their immune system will recognize the viral protein. This recognition allows the immune system to be prepared to attack the virus and protect the person from Ebola virus disease."

Researchers showed rVSV△G-ZEBOV-GP was effective at reducing the risk of infection, but no one knew how capable it was of preventing death in someone who was vaccinated after becoming infected during an epidemic （流行病）. To figure it out, Coulborn and her colleagues focused their efforts on the second-largest Ebola outbreak ever recorded, which occurred in the Democratic Republic of Congo between 2018 and 2020.

"Every single Ebola health facility across the entire Ebola epidemic had a standardized list of all admissions," says Coulborn. This list included 2,279 confirmed Ebola patients, and it recorded whether or not each person had been vaccinated before they got sick—and if so, when they'd received the vaccine.

Coulborn found the death rate was 56% among the unvaccinated. But for those who'd received the vaccine, that rate was cut in half. This was true no matter when someone got vaccinated before the appearance of symptoms. Additionally, those who'd been vaccinated had less virus circulating in their bodies than those who hadn't. So the vaccine played an important role.

Rebecca Coulborn says she feels buoyed by the results—since they offer clear evidence that people who're at risk of contracting Ebola should be vaccinated early. It's an opportunity to cut chains of transmission （传播） and prevent an outbreak before it gains speed.