As far as I am concerned, scientific spirits include some noble qualities, such as devotion, persistence and creativity.
For instance, if it had not been for Qian Xuesen's devoted work on missiles and rockets, China wouldn't have become such a powerful country/so powerful a country in the world in a short time. Similarly, the hybrid rice that Dr. Yuan developed has decreased the number of the hungry people around the world greatly. We should show respect for the great scientists and learn the scientific spirits from them.
As students, if we can apply the scientific spirits to our study, we can handle the difficulties and problems we meet with.

My Hero
Each person has his or her own hero. My hero is Liang Jianying. Born in 1972, she is the general designer of China's high-speed railway. She graduated from university in 1995.Ever since, she has been devoting all her time and energy to the development of China's high-speed railway. Afterwards, she led her team and invented the 300—350 km/h high-speed EMU, making it more convenient for us to get around quickly.
Liang Jianying has set a good example to us. From her, I realize that we should keep on trying until we realize our dreams.

Once there was a little girl named Emily. Although her singing was very pleasant to hear, lacking courage, she never dared to sing in front of strangers.
One summer, the neighborhood where she lived would hold a singing competition. Her best friend, Lucy, came to invite her to participate in the competition, but Emily said,“I'm afraid to take part in it.” Her mother said, “It's okay.Just do it bravely.” Emily followed her mom's advice and decided to give herself a try. The day came. Emily and Lucy went to the competition site. But she was too timid (胆小的) to walk onto the stage. She had been waiting until others finished singing. She shakily forced herself to stand on the stage. She started to sing, but her voice was so low. What's worse, she was so nervous that she forgot the lyrics (歌词) after singing a few words. Being laughed at by others, embarrassed and shy, she ran away from the stage.
Some naughty boys ran after her and said, “Emily, coward (胆小鬼)! Emily, coward!” Emily didn't argue with them. What she wanted was to go back home as quickly as she could. Finally, she rushed into the house, hugged her mom and cried sadly.
“Well, my poor girl. Don't cry. Tell me what happened to you,” asked her mom. Emily looked up at her mother and told her what she had experienced.
Listening to her, her mom cupped her face and said, “It doesn't matter, girl. As long as you practice singing more in front of strangers, you will become braver little by little. So, my girl, don't be beaten by a failure. You can go out to practice singing every day. No matter who is listening to you, go on singing and never stop. I believe there will be a harvest for you.”

Paragraph 1:
Emily listened to her mother carefully and followed her suggestion. The next day, she began to practice singing outside. Gradually, she became more and more confident and her singing voice became louder and louder. Months later, she could sing as she was walking in spite of many strangers. One day, when she was singing, the naughty boys who had laughed at her before cried to her, “Emily, coward! Emily, coward!” However, she chose to ignore their behavior.
Paragraph 2:
Going on singing, she walked into the park, where many people were singing and dancing. Hearing her beautiful voice, some stopped to listen to her singing and clapped for her. Emily felt pleased that she could sing confidently in front of strangers. The next year, the neighborhood held the singing competition again. This time, Emily walked onto the stage bravely, and her loud and beautiful voice of singing moved all the people. They all cheered for her, including those who had laughed at her. Her mother and Lucy were delighted to see the timid girl had become a brave one.