Many writers at the festival specialize in historical and political events.

VOA: special.2009.10.12

So, we are going to specialize to a very limited class of problems in the rest of this class.

在接下来的时间里,我们会专门研究,一类非常有限的问题

耶鲁公开课 - 基础物理课程节选

"I specialize in a very specific type of security: subconscious security."

VOA: standard.2010.07.16