A hearing is scheduled in Boston federal court Tuesday to address in part the extent to which documents from Harvard University should be made public in an ongoing lawsuit that accuses the school of discriminating against Asian-American applicants.

1. to address...是“举行听证会” 的目的状语。我们分析这个不定式，简化成分后：
to address the extent to which documents should be made public

2. address 的意思是：提出；讨论；处理；解决。 the extent 为其宾语，意思是“程度”。address the extent，意为“讨论并解决做某事程度” 至于什么事情的程度，看后面的定语从句才会知道。

3. 网友应该熟悉这些词组：
to some extent 在一定程度上 ; 在某种程度上 ; 达到某种程度
to a certain extent  在一定程度上 ; 在某种程度上 
to a great extent 在很大程度上 ; 到达很高的程度 
to the extent  达到那个程度

the extent  （to which...） 定语从句叙述事件所达到的那种程度

4. 那么，如果 the extent 作先行词，后面接定语从句，通常都是用 to which 引导定语从句的。所以， to which documents from Harvard University should be made public in an ongoing lawsuit  是修饰 the extent 的定语从句。

5. 该不定式的意思是：讨论和解决哈佛大学的文件应该在多大程度上公开。直译是：讨论和解决哈佛大学的文件应该被公开的程度。

6.词典例句：
The book discusses the extent to which family life has changed over the past 50 years. 
本书论述了近50年来家庭生活的变化程度。
《牛津高阶英汉双解词典》
The extent to which it helped to promote Britain's broader strategic interests was sometimes questionable 
它对于促进英国获得更广泛的战略利益到底有多大的帮助，这一点有时候值得怀疑。
《柯林斯高阶英汉双解学习词典》
Through doing this, the teacher will be able to ascertain the extent to which the child understands what he is reading 
这样一来，老师就能确定孩子们对他所读的内容理解多少了。
《柯林斯高阶英汉双解学习词典》