Traveling by bicycle is a very popular means of transportation throughout China. China has a huge population, and it is said that there is at least one bicycle for every two people within the country. Of course, many people in China ride bicycles purely for sport or exercise, but it's also a much more commonly accepted means of everyday transportation, as compared to countries such as the United States.

    If you are living for a long period of time in China, chances are you will want to purchase your own bicycle so that you can use it whenever you want for transportation or just for the enjoyment of riding. Even if you don't use a bicycle for everyday transportation, owning one can be a great way of enjoying some of the trails in the rural areas, just for fun. However, if you are just visiting China, renting a bicycle can be a more convenient choice.

    It is important to choose the correct bicycle for your use. You'll find that in China, the one-speed style of bicycle is extremely popular. These bicycles are great if you want to ride around in the city to see the sights. They are quite comfortable and easy to ride. You can often rent a bicycle for an entire day for around $15.

    However, if you wish to ride on some of the rural paths, a mountain bike style would be a better choice. They are great for different kinds of road surfaces, providing for a safer ride. If you are planning to have a desire to tour and still be able to carry packages with you, then a touring bike would be the best choice. These are generally the most expensive to rent, but are extremely handy for carrying packages and even some of your luggage along with you.

    When other nine-year-old kids were playing games, she was working at a petrol station. When other teens were studying or going out, she struggled to find a place to sleep on the street. But she overcame these terrible setbacks to win a highly competitive scholarship and gain entry to Harvard University. And her amazing story has inspired a movie,“ Homeless to Harvard: The Liz Murray Story”, shown in late April.

    Liz Murray, a 22-year-old American girl, has been writing a real-life story of willpower and determination. Liz grew up in the shadow of two drug-addicted parents. There was never enough food or warm clothes in the house. Liz was the only member of the family who had a job. Her mother had AIDS and died when Liz was just 15 years old. The effect of that became a turning point in her life. Connecting the environment in which she had grown up with how her mother had died, she decided to do something about it.

    Liz went back to school. She threw herself into her studies, never telling her teachers that she was homeless. At night, she lived on the streets. “What drove me to live on had something to do with understanding, by understanding that there was a whole other way o f being. I had only experienced a small part of the society,” she wrote in her book Breaking Night.

    She admitted that she used envy to drive herself on. She used the benefits that come easily to others, such as a safe living environment, to encourage herself that “next to nothing could hold me down”. She finished high school in just two years and won a full scholarship to study at Harvard University. But Liz decided to leave her top university a couple of months earlier this year in order to take care of her father, who has also developed AIDS.“I love my parents so much. They are drug addicts. But I never forget that they love me all the time.”

    Liz wants moviegoers (who often see films) to come away with the idea that changing your life is “as simple as making a decision”.

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    Most birds produce short, simple calls, but songbirds also have the ability of many complex vocal (发声的) patterns that help them attract mates, defend territory (领地), and strengthen their social bonds. Each songbird species has its own unique song patterns, some with characteristic regional dialects. Experienced listeners can even distinguish individual birds by their unique songs.

    A lot of what scientists know about bird song comes from studying zebra finches. A baby male zebra finch typically learns to sing from its father or other males, starting while it's still a baby bird in the nest. First comes the sensory learning stage, when the baby finch hears the songs sung around it and commits them to memory. The bird starts to vocalize during the motor learning stage, practicing until it can match the song it memorized. As the bird learns, hearing the tutor's song over and over again is helpful — up to a point. If it hears the song too many times, the imitation (模仿) becomes worse -- and the source matters. If the song is played through a loudspeaker, he can't pick it up as easily. But hide the same loudspeaker inside a toy painted to look like a zebra finch, and his learning improves.

    What if the baby never hears another zebra finch's song? Interestingly enough, it'll sing anyway. Isolated finches still produce what are called innate songs or isolate songs. A specific tune might be taught, but the instinct to sing seems to exist in a songbird's brain. Innate songs sound different from the “cultured” songs learned from other finches - at first. If isolate zebra finches start a new colony, the young birds pick up the isolate song from their fathers. But the song changes from generation to generation. And after a few generations, the melody actually starts to resemble the cultured songs sung by zebra finches in the wild.

    "Iris scan (虹膜扫描), please," the bank's computer voice tells you . You step up and the computer reads your eye, comparing it to the stored file it has of your iris. The images had better match—otherwise you won't be able to get your money.

    Iris scanning and other technologies, such as fingerprint and voice scanning, have appeared in many science fiction movies in the past. Today, these advanced technologies are part of the real world. They are common at work, the bank, the airport, and your local prison. The iris scan, fingerprint scan, and voice scan are all examples of biometrics( 生物测定学) a fast developing area of automatic personal identification technology . Basically, biometrics uses various ways to verify a person's identity, based on the individual's unique characteristics, including fingerprints, voices, irises, body heat patterns, facial images, handprints, signatures and so on.

    Biometrics identification systems have a number of advantages over password systems. The primary advantage is that an individual has to be physically present in order to be identified. Another important advantage is that there are no passwords to remember, forget, lose or steal.

    The voice scan is the simplest and most affordable form of biometrics. It only requires a computer, a microphone and the correct software. The software records a subject's voice and then compares it to a stored voice sample for identification purposes.

    For additional safety, fingerprint and handprint scans can also be employed. Fingerprint scans take the image of a fingerprint and compare it to a stored file of prints. Handprint scans identify the unique features of a hand.

    Iris scans currently give the highest level of accuracy among all the available biometrics systems. Another technology, full facial scans, is currently in use at border crossings and airports. Facial scanning equipment can actually track and identify moving faces within a crowd.

    The potential of biometrics is exciting and encouraging. With continued development, testing, and application, current technologies will become even more effective in the future. Soon, the days of password and car keys will be gone. Just don't leave home without your fingerprints!

    Educators across the US are calling for major changes to the admissions process in higher education. The Harvard school of Greduate Education, along with 80 other schools and organizations, released a report called "Turning the Tide Making Caring Common” in January, 2016. The report argues that the process schools use to choose students causes major problems.

    David Hawkins is the Executive Director for Educational Content and Policy at the National Association for College Admissions Counseling. Hawkins told Voice of America that most colleges and universities require many things from students when they apply. Schools usually ask for an essay describing a student's interests or why they want to study at that school. The schools also ask for letters from teachers or other responsible adults describing why a student is a good candidate. But, Hawkins says, the area that schools are most concerned about is a student's high school grades and standardized test results.

    The report suggests that paying attention to academic success over other qualities works well for some students but hurts others. In addition, academic success is not the most important quality a student should have. More attention should be paid to showing whether or not a student wants to do well in the world, according to the report.

    The report goes on to state that the best way to change the admissions process is by changing college applications. It suggests that schools should ask for evidence that students care about other people. But the report does have its critics. Bob Schaeffer, Public Education Director for the National Center for Fair and Open Testing, said that every few years, someone makes the same argument for changes, but no real change has happed yet. Even many of the schools that agree with the report still make no changes.

    Lloyd Thacker, Executive Director of the Education Conservancy, said that until a majority of schools agree to make the changes, there will still be problems. However, he said, the admissions process was better in the past. If bad changes can affect the process, so can good ones.

    Are you interested in movie musicals? Here are some best movie musicals you need to watch.

    Singin' in the Rain (1952)

    Debbie Reynolds (the heroine) is ultra-charming in this time-honored classic musical about the coming of the talking pictures in movie history. She plays a winning showgirl with a golden singing voice designed for Hollywood stars. You can also see how Gene Kelly (the hero) made a hit in the timeless "Singin'in the Rain".

    The Sound of Music (1965)

    It hit the big screen in 1965 and became an early blockbuster. It's one of those movies that everybody watches again and again. Whether you're singing along to "Do-Re-Mi" or "My Favorite Things", you'll still think of the cute Von Trapp children and the beautiful Austrian setting. Christopher Plummer (the hero) is wonderful as the serious captain melts into gentleness when singing "Edelweiss". And Julie Andrews (the heroine) shows her addictive voice in such songs as "I Have Confidence".

    Chicago (2002)

    Renee Zellweger and Catherine Zeta-Jones sing and dance as criminals in this musical about fame, envy, and murderous love. Famous songs include "Cell Block Tango", where female criminals sing about how they ended up in jail. It won Best Picture, Best Actress in a supporting role, Best Art Direction-Set Decoration, Best Costume Design, Best Film Editing, and Best Sound in Oscar 2003.

    La La Land (2016)

    Struggling actress Mia (Emma Stone) and ambitious jazz pianist Sebastian (Ryan Gosling) begin a romance as they both follow their heart in the path of their dreams in Los Angeles. It won Best Performance by an Actress in a leading role, Best Achievement in Directing, Best Achievement in Cinematography, Best Achievement in Music Written for Motion Pictures, and Best Achievement in Production Design in Oscar 2017.