Last month I was lucky enough to have a chance to make a trip into space with my friend Li Yanping, an astronomer. We visited the moon in our spaceship!

    Before we left, Li Yanping explained to me that the force of gravity would change three times on our journey and that the first change would be the most powerful. Then we were off. As the rocket rose into the air, we were pushed back into our seats because we were trying to escape the pull of the earth's gravity. It was so hard that we could not say anything to each other. Gradually the weight lessened and I was able to talk to him. "Why is the spaceship not falling back to the earth? On the earth if I fall from a tree I will fall to the ground." I asked. "We are too far from the earth now to feel its pull, " he explained, "so we feel as if there is no gravity at all. When we get closer to the moon, we shall feel its gravity pulling us, but it will not be as strong a pull as the earth's. " I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.

    When we got there, I wanted to explore immediately. "Come on," I said. "If you are right, my mass will be less than on the earth because the moon is smaller and I will be able to move more freely. I might even grow taller if I stay here long enough. I shall certainly weigh less!" I laughed and climbed down the steps from the spaceship. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over. "Oh dear," I cried, "walking does need a bit of practice now that gravity has changed." After a while I got the hang of it and we began to enjoy ourselves.

Around the World by Wheelchair

    Rick Hansen was always an active kid and loved to fish. When returning in a truck one day from a fishing trip, he had an accident and suffered injuries to his spine (脊柱)，This 15-year-old young man awoke to find that he had lost the use of his legs. However, he didn't give up. Many months later he began to compete in wheelchair sports. At the age of 27, he decided to wheel around the world to raise awareness and money for spinal cord research. His tour took him through 34 countries around the world between 1985 and1987. In this Man of Motion World Tour, he wheeled 24,901.55 miles, which is equal to the distance around the earth.

    Bad weather and difficult, rocky roads often provided challenges for Rick, but he continued to push himself to complete the trip. He was determined to succeed. Even mountains did not stop Rick Hansen. He wheeled himself up the Rocky Mountains and several other major mountains in the world. He even wheeled himself along the Great Wall of China!

    “Never Give Up On Your Dream” was his motto and he hasn't given up yet. He completed his world tour raising $24 million. He continues to work to increase knowledge of spinal cord injury. He is a true Canadian hero who shows what determination can achieve.

    Josh Hill, a biology teacher at Mar Vista High School in California, US, often gets sick after swimming in the ocean at Imperial Beach in California.

    He and a group of students are raising awareness(意识)about water pollution by taking weekly water samples(样本)of the ocean and publishing their results online.

    Every Thursday, Hill and his students collect water from the ocean. Students then take the samples to their school and test them for levels of bacteria. Usually, samples closer to the border have higher levels of bacteria, Hill said.

    “Water quality is usually the worst at the southern end and it increasingly gets better,” he said.

    Hill collects the samples on Thursdays so that students can publish the results on the Surfrider Foundation's website in time for the weekend. The Surfrider Foundation has give Mar Vista lab equipment and promote the students' results on its site.

    Most of Hill's students grew up in Imperial Beach. Many have gotten sick from the water or know someone who has.

    Cameron Bell, 17, who is currently applying to college, wants to pursue a STEM career. He appreciates the fact the he can get lab experience at school. “Our research really impacts our community because it's keeping people safe,” he said.

    On a recent Thursday morning, Anthony Gass, 15, collected some samples. Before he got into the water, his classmates helped him put on waterproof(防水的)clothes and tie a rope around his waist to protect him from the onrush of water.

    Hill said the protection probably wasn't necessary, but that it was better to be safe than to be sorry. “We just want to make sure we protect the students,” he said.

    He was a founder of modem Chinese literature. He was regarded as "an old man always telling the truth". Living across two centuries, he experienced many periods of danger and suffering but never lost his beliefs. His name was Ba Jin.

    As the 101-year-old legendary（传奇的）writer passed away in Shanghai after a six-year battle with disease, millions of Chinese were deeply sad. People in Shanghai and Chengdu gathered around his old house and literature museum to mourn for the great man.

    "My school held a series of ceremonies to express our deep sorrow,'' said Zuo Shang, a 17-year-old girl in Shanghai, who appreciates much of Ba's works. "He is a great writer who wrote so many masterpieces, but what I admire about him the most is his courage to tell the truth, 'Telling the truth, being an honest man.' That's what I learned from him," explained Zuo.

    Ba Jin was born in 1904 in Chengdu, Sichuan Province. A son of a wealthy family, Ba helped the poor ever since he was a child. It is they who taught him a strong yet down-to earth way of living.

    Ba finished his first novel, "Destruction", in 1929 during his travels to France. His later masterpieces, "Family" "Spring" and "Autumn", mirrored the struggles, tragedies and loves of the young in a feudal society. The books encouraged Chinese people not to give in to fate and to be their own masters.

    "Ba Jin told the true story of his country and his people. His great love and service to them meant he was thinking about what he could do for them," said Bing Xin, a well-known writer and also his good friend.

    Like other famous writers in China, Ba suffered in the "cultural revolution" during 1966—1976. But several years later, Ba examined his hard experience in strict introspection（自我反省）instead of hatred. His book, "Random Thoughts"， in 1979 displayed his real thoughts with painful sincerity and won him his reputation for honesty.

    "It really hurts to recall my past mistakes, but 1 have to," said the respectable man. "Always tell the truth. Say what you think in the bottom of your heart. That's my life motto."

    I waited half an hour, set the board, and sat in the studio, reviewing my questions until the telephone lines flashed.

    "Hello?"

    "This is Connie Chung. I'm so sorry I'm late."

    Connie Chung was one of the only four women anchors（主播）to make it into the club of major evening network television news. For almost an hour we talked about the industry. When I asked if she ever had an instructor throughout her trials, she turned around and offered to instruct me. When I asked why she decided to do it, she simply replied, "Because you're good."

    That afternoon I rushed home and told my mother what had happened. Without looking up, she just said "Good for you." Hearing this, I felt a sense of loss.  Her consistent response always made me feel under-appreciated.

    Until then I had been searching for something that I would never get—that sense of love and acceptance in a house full of negativity（消极）.

    I knew I needed to get rid of all the negativity in my life first, so I packed my bags and walked out of the house, thinking a risk would allow me to open myself to the world again and receive all the positive energy that I needed.

    Then radio became my way of connecting with others. My ability to book high-level guests and celebrities（名人）was gradually recognized and eventually all the words of encouragement from past guests and colleagues helped me to re-build my confidence levels. "I can do this," I kept telling myself, and pushed even harder to find my next aim.

    People had faith in me, so I developed faith in myself. Their positive attitudes towards themselves and towards me helped me develop my own positive attitude, leading to productive interactions with celebrities and adding to my list of instructors.

    I may not have started life surrounded by positivity but I surely feel that I am surrounded by it now. It's amazing how positivity builds on itself.

It is a special cross-country race. The competitors' vehicles are made{#blank#}1{#/blank#}fruits and vegetables like carrots eggplants, grapefruits, pumpkins and oranges. They are the creations of pupils from the Shanghai World Foreign Language Primary School.

According to Chen You, the science class teacher,{#blank#}2{#/blank#}(base) knowledge had been taught within 6 classes to students before they drew sketches and{#blank#}3{#/blank#}(choose) vegetables to make a food car.

Although students were encouraged{#blank#}4{#/blank#}(design) their cars together with parents, all the cars should be made in the class. After{#blank#}5{#/blank#}(bring) piles of ingredients as well as tools the children began their innovation. Some cut the carrot slices to make them round, and some others assembled (组装) their car components together.

In addition to the{#blank#}6{#/blank#}(compete), students are required to reflect on the {#blank#}7{#/blank#}(difficulty) they encountered making their vehicles,{#blank#}8{#/blank#}things they have learned from the activity and the improvements they think the course can make.

{#blank#}9{#/blank#}touched the teachers most was the unity and friendship among the children. For example, although the contest was fierce (激烈的), students felt {#blank#}10{#/blank#}(excite) for the champion car as if they themselves had stood out, and when a girl's car fell apart their friends comforted her and helped reassemble the car.