求翻译：“国家不幸诗家幸，赋到沧桑句便工”，李煜作为五代十国时期一个偏安小国的亡国君主，他无疑是失败的，但是作为词人他的成就却是非常的。他的词仿佛能够穿越历史时空受到历代不同层次的读者的喜欢，自宋代以来对于李煜词的研究的层出不穷，总体来说对其词的地位是褒扬多于贬抑。他的词改变了花间派裱丽香艳的艺术风格，提升了词的境界、扩大了词的抒情内涵，他不愧“千古词帝”的称号。本文将从李煜词的不同内容和艺术特点来入手，着重了解其人以及其人所处时代的变迁。是什么意思？

正在翻译，请等待...

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