Inuits of the Bering Sea were in isolation from contact with Europeans longer than Aleuts or Inuits of the North Pacific and northern Alaska.

答案是:isolated from contact with Europeans longer than were

他的解答是说有了这个were就可以防止发生歧义,但我怎么都没分清楚,歧义到底是怎么发生的,哪位语法强人能说说啊?谢谢了,我语法太垃圾了

两层歧义是Bering Sea Inuits were isolated from Europeans longer than (they) were isolated from  Aleuts and other Inuits
or that they were isolated from European longer than Aleuts and other Inuits were isolated from Europeans.

[ 本帖最后由 sd3195069 于 2008-3-16 10:37 编辑 ]

两种意思：
1.两个比较对象：BS的因纽特人与欧洲人隔绝的时间；Aleuts或NP和NA的因纽特人与欧洲人隔绝的时间---正解
2.两个比较对象：BS的因纽特人与欧洲人隔绝的时间；BS的因纽特人与Aleuts或NP和NA的因纽特人隔绝的时间---歧义

这,我知道是要消除歧义啊,但是为什么加了were之后就吧歧义消除了呢?
这个应该是省略吧,省略啊什么啊?原句应该是什么样子的?

一个歧异是：
Inuits of the Bering Sea were in isolation from contact with Europeans longer than with Aleuts or Inuits of the North Pacific and northern Alaska.
另一个是：
Inuits of the Bering Sea were in isolation from contact with Europeans longer than were Aleuts or Inuits of the North Pacific and northern Alaska.

ok,谢谢了,我明白了,
加个were是因为前面省略了they,,,,,,,,其实解答给的很清楚了,呵呵