Light travels at a speed which is about a million times faster than the speed of sound. In one second, light travels about 300,000 km, but sound travels only 344m. You can get some idea of this difference by watching the start of a race. If you stand some distance away from the starter, you can see smoke come from his gun before the sound reaches your ears. This great speed of light produces some strange facts. Sunlight takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays（光线）left the moon 1.3 seconds before they reached you. The nearest star is so far away that the light which you can see from it tonight started to travel towards you four years ago at a speed of nearly 2 million km per minute. In some cases the light from one of tonight's stars started on its journey to you before you were born.

    Thus, if we want to be honest, we cannot say “The stars are shinning tonight.” We have to say, “The stars look pretty. They were shining four years ago but their light has only just reached Earth.”

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    She almost did not run. Christine Williams admits that now. She could barely put one foot after another following the wake(守灵) for her sister, who had died in an automobile accident. But she did run. With the cheers of friends and strangers reaching her heart, Williams set a C.W. Post record in Boston. Now she will run again, in the national Division II cross-country championships in Evansville, Ind. She wanted to be sure she was doing the right thing by running. She was the middle of three sisters, between Kerry, who is 25, and Jennifer, who was 18.

    Just going through any motions was hard enough, but Christine Williams wanted to know if she should put on her uniform and her shoes and run through the woods on an autumn afternoon, in the awful gaping time between her sister's wake and her funeral. “I kind of got upset beforehand.”Williams admitted. Not a chatterbox under normal conditions, she now holds herself the best way she can, the fewer words the better. She almost walked away from the start line. But her friend Angela Toscano, who had flown up to Boston with her, directly from the wake, was standing near the line and talked her through it. “She said my sister would have wanted me to run.” Christine said. And that was enough to get her started.

    The accident happened just after midnight on Nov, 4. Four young women were driving in an unfamiliar area of Long Island in Eastport, N.Y., when one of them apparently ran a yield sign, and the car was hit by another vehicle. Heather Brownrigg and Jennifer Williams died, and their friends April Brown and Kaci Moran were treated at a hospital and released.

    The crash made the papers. April Brown was charged with drunken driving and driving without a license.

    The wake began on Nov. 6. The next day Christine was to run with the Post cross-country team at the regional meet. Rich Degnan, the Post coach, and Post officials offered a car service and tickets on the last flight to Boston for Christine and Toscano. When they arrived at the hotel, the entire team was waiting up for her.

    Everybody knew about it at the regional meet. Degnan had to arrange for the flexibility of an alternate, just in case Christine could not go. Several times during the race, Christine felt she could not continue. But then she heard her friends and all those other people, those strangers from other colleges, calling her name. She thought about Jennifer. And she ran. She finished fourth in 22 minutes 58 seconds, breaking the Post record for the 6-kilometer distance by 15 seconds. And although the Post team didn't qualify for the nationals, Christine did.

    I began writing poems fifteen years ago while I was in college. One day I was in the library, working on a term paper, when I came across a book of contemporary poetry. I don't remember the title of the book or any of the titles of the poems except one: “Frankenstein's Daughter.” The poem was wild, almost rude, and nothing like the rhyme-and-meter poetry I had read in high school. I had always thought that poetry was flowery writing about sunsets and walks on the beach, but that library book contained direct and sometimes shocking poetry about dogs, junked cars, rundown houses, and TVs. I checked the book out, curious to read more.

    Soon afterward, I started filling a notebook with my own poems. At first I was scared, partly because my poetry teacher, to whom this book is written for, was a serious and strict man who could see the errors in my poems. Also, I realized the seriousness of my devotion. I gave up geography to study poetry, which a good many friends said offered no future. I ignored them because I liked working with words, using them to reconstruct the past, which has always been a source of poetry for me.

    When I first studied poetry, I was single-minded. I woke to poetry and went to bed with poetry. I memorized poems, read English poets because I was told they would help shape my poems, and read classical Chinese poetry because I was told that it would add clarity to my work. But I was most taken by the Spanish and Latin American poets, particularly Pablo Neruda. My favorites of his were the odes ― long, short-lined poems celebrating common things like tomatoes, socks and scissors. I felt joyful when I read these odes, and when I began to write my own poems, I tried to remain faithful to the common things of my childhood — dogs, alleys (小巷), my baseball mitt (手套) and the fruit of the valley, especially the orange. I wanted to give these things life, to write so well that my poems would express their beauty.

    I also admired our own country's poetry. I saw that our poets often wrote about places where they grew up or places that impressed them deeply. James Wright wrote about Ohio and West Virginia, Philip Levine about Detroit, Gary Snyder about the Sierra Nevadas and about Japan, where for years he studied Zen Buddhism (禅宗佛教). I decided to write about the San Joaquin Valley, where my hometown, Fresno, is located. Some of my poems are absolute observations and images of nature — the orange yards, the Kings River, the Sequoias (红杉). I fell in love with the valley, both its ugliness and its beauty, and quietly wrote poems about it to share with others.

Famous Modern Chinese Buildings

    Beijing International Airport

    The first place most visitors see when they arrive in China is Beijing International Airport. The airport was constructed in the 1950s. It has an indoor garden, a children's playground, and over 70 food businesses in Terminal 3 alone.

Shanghai World Financial Center

    Completed in 2008, SWFC took over 10 years to complete due to financial shortages and construction delays. Since its completion, it has won countless architectural awards.

    Tourists are welcome at SWFC's viewing platform, which at 474 meters above ground is the world's highest closed viewing platform.

    The Water Cube

    It was constructed for use during the Beijing 2008 Summer Olympics. Now visitors can express surprise at the architecture of the building. They can enjoy the indoor atmosphere as well.

    Among the offerings of the Water Cube are a restaurant and bar, a shopping area, and Water World, a family water park

    The Bird's Nest, Beijing

    It was designed mainly for the 2008 Summer Olympics. It can hold up to 80,000 people and has been used for a winter theme park. Nowadays, its main income is as a tourist attraction. It draws more than 20,000 tourists every day.

    National Center for the Performing Arts

    It was completed in 2007. The building is surrounded by a man-made lake, requiring guests to enter via an underground hallway. It is home to an Opera Hall, Music Hall, and Theater.

Instagram(图片分享社交应用程序)is about to take its biggest step toward removing likes from its platform. After months of testing an option to hide likes in select international markets, Instagram, which is owned by Facebook(FB), has already been testing hiding likes in seven other countries, including Canada, Ireland and Australia. For years, likes have been central to how celebrities, brands, politicians and everyday users experience Instagram and Facebook. It's a way of measuring popularity(名气) and success. But in recent months, Instagram has been rethinking how likes contribute to making its platform more toxic. Now it's considering a change.

The total number of likes on posts — which appear as hearts on the app—will disappear from Instagram's main feed, profile pages and permalink(永久链接)pages. The owner of the account can still see their own likes, but their followers won't know the count.

CNN Business previously spoke with users in countries with the test. The majority felt this move would improve well-being on the app. Instagram is the most harmful social networking app for young people's mental health, such as negatively influencing body image, according to one study.

But other users and psychologists said hiding likes won't fix everything. The test doesn't address some of the key ways that activity on Instagram can influence the well-being of users, including bullying(欺凌), feeling left out and thinking other people's lives are better than their own.

Renee Engeln, a psychology professor at Northwestern University, voiced his opinion that the biggest impact of Instagram is the content and the exposure to this constant stream of perfected images is what seems to hurt psychologically. Plus, users can still see their own likes—and feel badly if their posts don't perform well.

China successfully launched the Chang'e-6 spacecraft on Friday. A Long March-5rocket lifted it off from the Wenchang Space Launch Site in Hainan. This was a huge success and a remarkable achievement for China's space exploration program. The launch not only shows China's advanced technological abilities but also makes scientists and space lovers around the world excited.

Collecting samples from the far side of the moon is a new thing for humanity. We have very little knowledge about this mysterious side. If the Chang'e-6 mission is successful, it will give scientists important and direct facts to know more about the far side's environment, geological features, and material make- up. This will be an important step forward in our exploration of the moon and the universe as a whole.

The Chang'e-6 spacecraft has an orbiter, a lander, an ascender（上升器）, and a returner. When it reaches the moon, it will land carefully on the far side. Within 48 hours after landing, a robot arm will carefully collect rocks and soil from the lunar surface. Also, a drill will go into the ground to take samples from deeper layers. At the same time, a series of complex scientific tests and analyses will be done to get valuable data.

The far side of the moon is very different from the side we can see. The Apollo basin in the South PoleAitken Basin is chosen as the landing and sampling place for the Chang'e-6 mission. This area is thought to have precious clues about the moon's formation and development, giving possible ideas about the early history of our celestial（天体）neighbor.

This mission has many technical difficulties and needs the latest technologies. It also gets help from international cooperation, showing the spirit of working together in the global search for space exploration. The exploration of the far side of the moon may provide valuable scientific data and open up new possibilities for future space activities, such as setting up long- term lunar bases and using lunar resources.

The success of the Chang'e-6 mission has the possibility to make more international cooperation in space exploration. It shows China's strong wish to add to the growth of global knowledge about the universe and encourages other countries to work together to find out the secrets of the universe.