White House officials say the president has a clear obligation to assess the effectiveness of U.S.strategy before placing more American troops in harm's way.

VOA: standard.2009.10.25

As we've been talking about, I think we have a strong obligation to save life where we can do so.

就像我们一直所讲的，我想我们,有责任尽我们所能来拯救生命。

普林斯顿公开课 - 人性课程节选

We've seen Milton's account there of how he had attempted to reconcile, on the one hand, his obligation to become a minister and his desire, on the other hand, to become a poet.

我们读到过弥尔顿关于他如此试图妥协和解的描写，一方面，他想要成为牧师，另一方面，他又渴望着成为一名诗人。

耶鲁公开课 - 弥尔顿课程节选

He also noted that Islamic authorities say a face veil is not a religious obligation.

VOA: standard.2010.01.30

Because I don't think it carries a sense of obligation.

因为这个判断里没有一种强制的意味。

耶鲁公开课 - 心理学导论课程节选

President Obama and I consider this to be a solemn obligation."

VOA: standard.2009.10.21

The other thing is moral hazard -this is that companies, once they borrow money from anybody, a bank or anyone else, they have an obligation, which is fixed in dollar terms.

另一个问题是道德风险,意思是说,一旦公司借了钱,无论是从银行还是其他渠道,他们就背负了一种义务,金钱的义务

耶鲁公开课 - 金融市场课程节选

"President Obama and I consider this to be a solemn obligation."

VOA: standard.2009.10.22

So every generation of Israel is to view itself as standing at the sacred mountain to conclude a covenant with God, and that decisive moment has to be made ever-present. That's a process that's facilitated by the obligation to study, to study the laws, to recite them daily, to teach them to your children: these are instructions that are contained in Deuteronomy.

那么每一代以色列人都将自己看做站在圣山上,与上帝立约的人，于是那个决定性的时刻,被变为了恒久的场景这是通过学习，学习律法,而达成的过程，每天背诵它们，把它们交给你的孩子们：这是申命记中,包含的指示。

耶鲁公开课 - 旧约导论课程节选

"The way I see it,having recovered with the help of the American government and the American taxpayer, our banks now have a greater obligation to the goal of a wider recovery,"

VOA: standard.2009.12.20

Of two pleasures, if there be one to which all or almost all who have experience of both give a decided preference, irrespective of any feeling of moral obligation to prefer it -- in other words, no outside, no independent standard -- then, that is the more desirable pleasure."

这两种快乐中，如果所有或几乎所有,两种都体验过的人，都更偏好其中一种，而且并不是出于任何道德责任-,换句话说，没有外界的，独立的标准影响-,那么该快乐就是更令人满意的“

耶鲁公开课 - 公正课程节选