写下这个标题,是因为想起了我年轻时候人尽皆知的一首励志诗:攻城莫畏坚,攻书莫畏难,科学有险阻,苦战能过关。攻城与守城,争冠与卫冕,都是一对矛盾体,有着可以类比的意义。在足球场上,卫冕犹如守城,争冠就是攻城,有了攻与守的较量,比赛才因此而精彩。 Write down this title, because I remembered a well-known inspirational poem when I was young: the siege Mo fear Jian, Mo fearless scoundrels, science has the danger, bitter battle to pass. Siege and defenders, title competition and defending, are a contradiction body, has the meaning of analogy. In the football field, defending like guarding the city, the title race is to siege, there is a contest between attack and defense, the game was wonderful.