文学大师钱钟书所著《围城》，通过不学无术的主人公方鸿渐出国留学的生活历程，将家庭爱情比喻成一个“围城”，城里的主角男或女想冲出来，城外的男或女想冲进去，揭示了人类这“两腿无毛”的高级动物有趣的爱情观、人生观。
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