Some materials are available free at Web sites like the Purdue Online Writing Lab,or OWL.

VOA: special.2010.02.11

I'm a night owl.

我是个熬夜的人。

普林斯顿公开课 - 国际座谈会课程节选

You have just heard the American story "An Occurrence at Owl Creek Bridge."

VOA: special.2011.05.28

Our story today is called, "An Occurrence at Owl Creek Bridge."

VOA: special.2011.05.28

The address is owl.english.purdue.edu.

VOA: special.2010.02.11