U.S.officials never acknowledge these strikes, saying they do not discuss operational or intelligence matters.

VOA: standard.2009.10.27

The--what I tend to do is not discuss the readings all that much in class.

我在课堂上,不会过多谈论阅读资料

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选