This development--and its strong implication for US politics and economy in years ahead--has enthroned the South as Americas most densely populated region for the first time in the history of the nations head counting.
【词汇突破】enthrone: 使成为.
densely：密集的
nations head counting：全国人口普查(同census)
implication 重要意义和重要性，影响
【主干识别】this deelopment has enthroned the South as Americas most densely populated region.
【其他成分】and its strong implication for US politics and economy in years ahead插入语;in years ahead在未来的几年中(前面我们有学到in the years to come);for the first time:介词短语作状语，可换为firsly;in the history of the nations head counting时间状语。
【微观解析】这个句子中值得积累的句型为 sth has enthroned sth as
【难点揭秘】对enthorne搭配的掌握以及in years ahead的理解。
【译文赏析】这种发展以及其对美国政治、经济在未来几年的潜在的强有力的影响一一使得南部在全国人口普查中有史以来首次成为美国人口最密集的地区。