凡是拒绝履行自己义务的国家必须面对各种后果。

Those nations that refuse to live up to their obligations must face consequences.

youdao

它表示评估必须以已知因素为基础，包括过去的和现在的条件这样可能损害债权人及时履行偿还义务的能力。

It says estimates should be based on known factors, including historic and existing conditions that could impair a creditor's ability to pay back its obligation in a timely fashion.

youdao

即便是身为“永远的贞女”一事也从未对她产生过不利的影响(在一个婚姻几乎是必须履行之义务的国度里，她却始终没有结婚，也无子女)。

Even her being an "eternal virgin" (never marrying, never having children in a country where wedlock is almost mandatory) was never held against her.

youdao

And that's our obligation to send them to war only when we have to, and only when we know they can actually achieve their mission is a key difference between what I advocate and what the neo-cons advocate.

我们有义务,在必须的时候，送他们上战场，我们必须确保,他们一旦奔赴战场就能完成使命,这是重大的不同,我和新型保守派主张的不同之处主要在此。

普林斯顿公开课 - 国际座谈会课程节选