Historian Marc Masurovsky is co-founder of the Holocaust Art Restitution Project (SAYING) Masurovsky often turns to Spiegler to discuss thorny legal and ethical questions.

VOA: standard.2010.07.26

There are widespread controversies about it, and many of the courses you would take in law school are meant to try to get to the bottom of these thorny questions.

这个问题有很多争议，法学院的很多课都旨在,把这些棘手的问题弄得水落石出。

耶鲁公开课 - 文学理论导论课程节选

The secretary reportedly has been trying to mediate between Kurdish leaders and the central government in Baghdad, over a thorny territorial dispute over the oil-rich region of Kirkuk.

VOA: standard.2009.07.29

The real issue lies in how much attention and how much consistency and perseverance we put in strengthening democratic institutions The summit's mostly closed door sessions are taking up several thorny issues, among them a proposal to create an African Defense Council.

VOA: standard.2009.07.02