【1】Here are the gates of Buckingham Palace, and nearby on Whitehall is the site of a concentration of government buildings.【倒装结构】

这里是白金汉宫的大门，而且白厅的附近就是政府大楼的集中地。

并列句(1):Here are the gates of Buckingham Palace

并列连词:and

并列句(2): nearby on Whitehall is the site of a concentration of government buildings.

【2】Here are the gates of Buckingham Palace, and the site of a concentration of government buildings is nearby on Whitehall.【陈述结构】

这里是白金汉宫的大门，而且政府大楼的集中地就在白厅的附近。

并列句(1):Here are the gates of Buckingham Palace

并列连词:and

并列句(2): the site of a concentration of government buildings is nearby on Whitehall

St James Park here is the oldest of the royal parks and it's also the smallest and most ornamental. Here are the gates of Buckingham Palace, and nearby on Whitehall, the site of a concentration of government buildings. The two guardsmen posted front, on Horse Guards Parade are famously quite unruffled by the crowds of tourists.

参考译文:这里的圣詹姆斯公园是最古老的皇家公园，它也是最小最具有装饰性的。这里是白金汉宫的大门，而且附近的白厅就是政府大楼的集中地。在皇家骑兵卫队阅兵场前站岗的两名卫兵对成群的游客表现得相当镇定。