5.Some use them to keep a close watch on the demand for their line of work or gather information on compensation to arm themselves when negotiating for a raise.
【译文】 有些人利用它们（搜索代理）密切关注本行业的需求，或搜集有关补偿信息，为增薪谈判作好准备。
【析句】 该句的主干是Some use them。to keep a close watch… work和gather information… a raise是两个并列的不定式结构，在句子中做目的状语。第二个目的状语又含有一个表示目的的不定式短语 to arm themselves when negotiating for a raise。

6. This,for those as yet unaware of such a disadvantage,refers to discrimination against those whose surnames begin with a letter in the lower half of the alphabet.
【译文】 对于尚未意识到其不利之处的人来说，它指的是对那些姓氏起头字母位于字母表后半部的人的歧视。
【析句】 句子的主干是this refers to discrimination。for those as yet unaware of such a disadvantage是一个作状语的介词短语，unaware of such a disadvantage作those的定语。全句的宾语是discrimination+介词短语（against those），whose surnames…the alphabet是修饰those的定语从句。

石春祯英语阅读220	数学基础过关660	09考研英语基础班