The excellent essay for primary school students began: In this world, everyone had their own dreams and goals. My dream is to become an excellent scientist and contribute to the progress and development of mankind. In order to realize my dream, I study hard and constantly explore new knowledge and skills. I believe that as long as I persevere, I will succeed. The ending of the excellent essay for primary school students: In the process of realizing my dream, I found many touching stories and characters. For example, scientists constantly challenged themselves to overcome various difficulties in order to explore the unknown, and some volunteers selflessly gave their time and energy to help the disadvantaged. These stories and characters made me deeply feel the power of dreams and the meaning of life. My dream is to become an excellent scientist and contribute to the progress and development of mankind. I believe that as long as I persevere, I will succeed.