They shouldn't be disappointed or let their heads fall, but walk tall.

他们不应该失望或垂头丧气，而应该昂首阔步。

《柯林斯英汉双解大词典》

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The exhibition's curator, Nick Bonner, is disappointed the North Koreans will not be allowed to explain their work.

VOA: standard.2009.12.09

We could no longer be disappointed, because to be disappointed in something presupposes that it could've been some other way.

我们不会再感到失望，因为对某些事情失望就表明,事情可以是另一个样子。

耶鲁公开课 - 死亡课程节选

"I'm disappointed in the people who claim to be the leaders of the right-wing constituency in the country.

VOA: standard.2009.12.10

Better informed consumers are less likely to be disappointed, and more forgiving if they are.

FORBES: Unavoidable Branding

If you come up with ambitious goals, investors will be disappointed when you don't meet them.

CNN: BUSINESS

None of that will matter to gamers, of course, and Baig says they won't be disappointed.

ENGADGET: The Pipeline: Mossberg on Napster to Go, Dvorak on the blogosphere