from...from...; feed into; spanning a thirty-year career

Suqi

老师，您好。以下摘自UNESCO关于表彰扫盲工作人员的一份出版物的序言。We read a personal and moving account of a friend and how he struggled to help shape a literacy programme which trans-formed and empowered in the real sense of the word. We hear from those who work in policy formulation, from a researcher, feeding into policy-making work spanning a thirty-year career in peace and war and we catch a glimpse of how international civil servants strive to influence a large bureaucracy whilst keeping their feet on the ground. Not to mention a chilling account of literacy efforts in time of civil war.
我对粗体部分很困惑。
1。 from those...from a researcher...researcher包括在those里，这样来举例，用法正式吗？
2。 feed into：字典里给出的用法都是:feed something into/to（http://dictionary.reverso.net/english-cobuild/feed——第6、7、11释义）。
3。 spanning a thirty-year career：...work spanning应该是由...work which spans，或者...work which is spanning变来的对吗？我觉得work spans+时间行，但搭配career不会很奇怪吗？work spans a thirty-year career?如果span是指researcher的话，那work和spanning之间也应该加上“,"才对呀。
全文：http://portal.unesco.org/education/en/ev.php-URL_ID=5964&URL_DO=DO_PRINTPAGE&URL_SECTION=201.html
谢谢老师~~

IsaacZ

• 是不是可以理解为 from a researcher 前面省略了 for example？——有时为了增加语言的力度，用逗号来代替明确的关联词语。
• 参考朗文当代英语词典（feed 词条）：
  

  feed into something phrasal verb
  to have an effect on something or help to make it happen:
  

  
                                 
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  The influence of Italian designer fashion feeds into sports fashion.

• 看一下："spanning a *-year career" - Google 搜索，似乎这样用的也不少。

Suqi

回复 2# IsaacZ
谢谢老师~~
1。 不过from a researcher那里，当时看老半天也没看出是对those的举例……
2。 老师，是不是朗文比柯林斯还全呐？
3。 果真不少啊~~事先应该自己要搜的~~
让老师费心了~~

IsaacZ

回复 3# Suqi

多参考几本词典还是有好处的。

Suqi

回复 4# IsaacZ
谢谢老师~~