Now, there are a couple of ways to think about indebtedness and I'd like you to tell me which one is correct as applied to the nation.

那么，究竟是什么导致国家债台高筑呢,我有两套思路，麻烦你们告诉我,哪个更能说明现状。

斯坦福公开课 - 经济学课程节选

One of the labors of reading Paradise Lost is the reader's obligation to supply the analog for the X, and this poem is filled with such X's.

读的一个麻烦就是,读者需要自行类比出X究竟是什么，偏偏诗中又充满了这种不确定物。

耶鲁公开课 - 弥尔顿课程节选