再问OG10-220

 220. For almost a hundred years after having its beginning in 1788, England exiled some 160,000 criminals to Australia.

 (A) For almost a hundred years after having its beginning in 1788,

 (B) Beginning in 1788 for a period of a hundred years,

 (C) Beginning a period of almost a hundred years, in 1788,

 (D) During a hundred years, a period beginning in 1788,

 (E) Over a period of a hundred years beginning in 1788,

 Choice D is awkward and unidiomatic, and nonsensically suggests that a hundred years is defined as a period beginning in 1788.

 我知道答案，也看到之前很多前辈讨论了这道题，我的不解还是关于D，有人说是"非限定从句"，"非限定同位"，"同位语"等等；

 我的问题是

 1.在During a hundred years, a period beginning in 1788,中，

 ",a period beginning in 1788,"这个成分看作"独立主格"可以么，或者是看作普通的"插入语"可以么，
总觉得这么修饰a hundred years没什么问题；

 2.我认为就算是非限定或者同位结构，也不会有什么歧异啊，就是像这样，

 During a hundred years, 修饰100年的成分, England exiled some 160,000 criminals to Australia.

 怎么看，也看不出什么问题啊；

 3.到底该怎么借读解释中的这两句话呢，

 Choice D is awkward and unidiomatic,

 是说"能(像E那样)用beginning直接限制years就不该分开用两个部分表示，所以错"，这么理解对么？

 and nonsensically suggests that a hundred years is defined as a period beginning in 1788.

 是说"100年与a period beginning in 1788不等价,所以不可以把前者定义为后者"，对么，可为什么一定要等价呢？
“,a period beginning in 1788,”只是用两个逗号隔开，单纯起到插入、修饰的作用不可以么？

 问题问了一大窜，挺麻烦的，希望同学能够帮助解答，感激不尽；

 下面是之前讨论的比较详尽的几个帖子；

 http://forum.chasedream.com/dispbbs.asp?BoardID=23&replyID=372962&id=44881&skin=0

 http://forum.chasedream.com/dispbbs.asp?BoardID=23&replyID=1016830&id=106237&skin=0

 http://forum.chasedream.com/dispbbs.aspboardid=23&replyid=1551122&id=49876&page=1&skin=0&Star=1

个人感觉 a period of 是一个习惯用法，这可能就是所谓的awkward and unidiomatic的解释吧。