Life is a long and rugged road pregnant with challenges and difficulties.Nonethless,there are always splendid moments with unparalled happiness and excitement,so unforgettable that our lives are truly meaningful only because of their existence.Like a chemist who finally succeeded in synthesising a miraculous compund,a physist who eventually proved the presence of an elusive particle,a biologist who unlocked the genetic code of an organism,a painter who depicted a surreal object and a storywriter who wrote about a unique and intriguing plot,people are capable of arriving at these great moments of enlightenment in scientific and artistic arena wth their endless pursuit of truth and beauty.