A simple example is shown in Listing 1, declaring a hash consisting of 6 attributes: a string, an integer, a Boolean, an undefined attribute, another hash, and a function.

清单1显示了一个简单的例子，它声明了一个包含6个属性的hash：一个字符串、一个整数、一个布尔值、一个未定义的属性、另一个hash和一个函数。

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A sort of undefined longing crept upon them.

一种莫名的渴望爬上了他们的心头。

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The undefined background also shows how Cecilia Beaux was influenced by the French Impressionists, who believed, like Beaux, in a personal rather than conventional approach to their subject matter.

这个不确定的背景也显示了塞西莉亚·波克斯是如何受到法国印象派画家的影响的，他们和波克斯一样赞同用个人而非传统的方法来处理主题对象。

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Yale University is a non-profit corporation; the price of a share in Yale University is undefined-- it's zero over zero.

耶鲁大学可以看作是个非盈利组织,它的股价无法定义,是零除以零

耶鲁公开课 - 金融市场课程节选

Ten years ago this creek was a mess, choked with silt and overflowing its undefined banks, a casualty of careless grazing.

FORBES: Riverkeeper

Howe defined crowdsourcing as the act of outsourcing a task to a large, undefined group of people through an open call.

FORBES: The Rise of Crime-Sourcing

Similarly, one camp maintains that temperatures are rising dramatically with unspeakable portents, while the other thinks what has happened is entirely a result of undefined internal oscillations in the earth-sun climate system, and that there is virtually no human component to climate change.

FORBES: Global Warming: Hotheads, Flatliners and Lukewarmers, Part One