When we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.

    People who are near-sighted can only see things that are very close to their eyes. Everything else seems ­­blurry. Many people who do a lot of work, such as writing, reading and sewing become near-sighted. People who are far-sighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.

    Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.

    Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself, look at an object out of one eye; then look at the same object out of your other eye. You will find the object's relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distances as people with two eyes.

    We asked more than 200 teachers,children's authors,and children's literature experts to name the best picture books ever.We made a list based on their advice.Here are some of the books in the list.

    If You Give a Mouse a Cookie by Laura Numeroff,illustrated by Felicia Bond

    Who it's for: Grades PreK-2

    What it's about: Oh,that hungry mouse.Once you give him the cookie,he will ask for a glass of milk,and then a straw（吸管）and then...The action is unstoppable!In the end,the mouse and the boy that gives him the cookie (and perhaps the reader) are extremely exhausted!With terrific pictures and a wonderful lead character,this book shouldn't be missed by little kids.

The Other Side by Jacqueline Woodson,illustrated by E.B.Lewis

    Who it's for: Grades 1-4

    What it's about: This is a story about a fence（篱笆）that divides a white neighborhood from a black one and two little girls whose need for play and friendship allow them to cross it.It has a very deep theme.

Owl Moon by Jane Yolen,illustrated by John Schoenherr

    Who it's for: Grades 1-5

    What it's about: A classic example of child's expanding a simple walk into a glorious adventure.As a girl and her father hike through the moonlit night,the creatures they come across become exciting companions（同伴）for their owl hunt.

    The Snowman by Raymond Briggs

    The only wordless story on our list.

    Who it's for: Grades PreK-2

    What it's about:A great book to lead a child into reading.A fanciful story of a boy who makes and then befriends a snowman who both enters his world and takes him out for fun.

    The arts, especially music, should be part of every school's lessons at every grade level. Students would be much smarter if they had musical experience. They could improve their classroom skills, like paying attention and following directions. People develop all these skills when they learn music. Making music also lets children use their imagination. It provides students with a chance to try out their own ideas.

    Music not only makes children better students, but also gives them something positive to do. In a music program, children can be part of a band instead of joining a gang(团伙). Parents can enjoy listening to their children's music instead of seeing them glued to a computer or TV screen. In a school band, students get to be part of a team. They can get along well with old friends and make new friends through music.

    Music builds self-confidence, too. It gives children a sense of achievement and success. Making music is something for them to be proud of. And it lets kids practice performing in front of an audience. Music gives children an opportunity for self-expression, and that helps develop their self-confidence.

    Once again, music is important because it can make children better students, give them something positive to do, and build their character. That is why music should be offered in every single grade in every school.

    When Johnny, a homeless man, spent his last $20, he wasn't looking at it as an investment — but it's about to pay him huge profits. After he helped a woman who ran out of gas, she returned the favor by raising a lot more on the Internet.

    Kate McClure, 27, was driving to visit a friend when she ran out of gas halfway. “He saw me pull over and knew something was wrong,” she wrote. “He told me to get back in the car and lock the doors. A few minutes later, he came back with a red gas can, using his last 20 dollars to make sure I could get home safe.”

    She couldn't repay him at that time because she had no cash with her. “I have been stopping by his spot for the past few weeks. I repaid him for the gas and gave him some clothes.”

    Kate decided to do more for him, so she started a crowdfunding(众筹) campaign on GoFundMe.com, and it quickly gained far beyond its initial $10,000 goal. When it reached $100,000, the fundraising page was shut down for a time at Johnny's request. Because he didn't want to seem like he was taking advantage of the situation. Finally, Kate said that she restarted it because the public interest had not decreased. She also added that Johnny planned to donate the rest to a good cause.

    According to the New York Post  Johnny wants to get a job at an Amazon warehouse and a department manager from the tech company has already reached out, saying he wants to help Jonny.

    February has long been a month of romance. With the sweet smell of roses in the air, romantic films hit cinemas and love stories fill newspapers and magazines.

    On the 14th day, it is customary for a boy to take his girlfriend out to dinner, buy her flowers and chocolates, write poems, sing to her or even spell out her name with rose petals!

    This is the scene that greets you on Valentine's Day, named after Valentine who was a priest in third century Rome. When the emperor decided that single men made better soldiers than those with wives, he banned marriage.

    But Valentine continued to perform marriage ceremonies for young lovers in secret. When his actions were discovered, the emperor had him put to death.

    While in prison, it is said that Valentine fell in love with the daughter of his prison guard. Before his death, he wrote her a letter, which he signed "From your Valentine", an expression that is still in use today.

    Valentine died for what he believed in and so was made a Saint, as well as becoming one of history's most romantic figures.

    Nowadays, Valentine's Day wins the same popularity among Chinese young people. It is a time when students "don't want to be alone" according to Gao Shunjie, a student reporter for 21st Century Teens in Jinling High School, Nanjing. Some of her classmates are planning to make Valentine's cards for parents, teachers and friends. Others want to hold parties at which they will exchange small gifts and eat heart shaped cakes. The idea is to have fun and encourage people to share in the spirit of St Valentine.

On a daily basis, the digital expanse witnesses an exchange of over two billion pictorial representations. Although imagery offers an entertaining and articulate avenue for online interaction, the process of digesting and generating such content presents formidable obstacles for individuals who are devoid of sight or are enduring profound visual impairments. Given the reality that there are more than 39 million individuals who are sightless, and an excess of 246 million who are grappling with severe visual limitations, a significant cohort may perceive themselves as alienated from the discourse that revolves around photographic content on the Internet. Scholars hailing from Harvard University are endeavoring to construct technological solutions that would enable the visually impaired populace to partake in the appreciation of photographic imagery with the same zest as their sighted counterparts.

The advent of automated descriptive text represents a groundbreaking innovation that engenders a narrative depiction of a photograph by leveraging the latest advancements in the field of object recognition technology. Individuals who rely on auditory output devices on their digital gadgets will now be presented with an enumeration of elements that a photograph might encapsulate as they navigate through online images. Previously, those utilizing auditory output devices were limited to hearing solely the nomenclature of the individual who disseminated the photograph, succeeded by the designation "photo" upon encountering a pictorial piece. However, the introduction of automated descriptive text now allows for a more elaborate portrayal of the contents of a photograph. For example, an individual might now perceive an auditory description such as "a visual scene comprising three individuals, exhibiting expressions of joy, in an outdoor setting."

This capability is made possible through the object recognition technology developed by Harvard University, which is predicated on a computational framework that encompasses billions of variables and has been refined through exposure to millions of exemplars. Each stride in object recognition technology signifies the potential for researchers to render technological interfaces increasingly inclusive and accessible to a broader demographic. When individuals are interlinked, they are positioned to accomplish remarkable feats, both in isolation and as a collective entity, and such interconnection benefits all participants within the network.

The rollout of the automated descriptive text is initially targeting auditory output devices on mobile communication devices configured to English, with plans to extend this functionality to additional linguistic variants and technological platforms in the near term. Although this technology is still in its infancy, harnessing its current competencies to articulate the essence of photographs marks a pivotal advancement in the quest to furnish our community with visual impediments with the identical advantages and gratifications that the broader population derives from photographic imagery.