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p。39。veamp。618。amp。643。(amp。601。)n] project, iamp。rsquo。m the director. in the past three years, i have a total of three projects, which brought me much happiness, let me know what is the scientific research and how to do the research. i took part in many petition for my interest,. the harvest is great, for example, i won the first prize in the international mathematical modeling petition, but the greatest harvest is not the prize