In his comments to the Middle Class Task Force, which is chaired by Vice President Joe Biden, Mr.Obama offered a preview.

VOA: standard.2010.01.25

Today I have the impossible task of finishing the parts of the Republic that I have assigned for the class.

今天我有个不可能的任务,完成《理想国》剩余的部份,依照我指定给同学的进度。

耶鲁公开课 - 政治哲学导论课程节选

My task in the class here isn't to do an in depth analysis of the biology or things--or scientific methods, or any things like that that would make you have to retain a lot of detail in the readings.

我在课上的任务不是用生物学的方法,或者类似的科学方法进行深入的分析,我的目的并非让你们记住这些细节

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选