In the district hospital's maternity ward, a wrinkled old woman walks out holding a just-born girl wrapped in a dirty rag like an unwelcome present.

在区医院的产科病房里，一位皱纹纵横的老妇人抱着一个刚出生的女婴走了出来，女婴被一块肮脏的破布包裹着，就像一件不受欢迎的礼物。

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Pigeons are often seen as dirty birds and an urban nuisance, but they are just the latest in a long line of animals that have been found to have abilities to help humans.

人们常把鸽子视为肮脏的鸟类或是城市的公害，但他们只是众多有能力帮助人类的动物中的最新一员。

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I'm an engine-driver, as you well may see, and there's no denying it's terribly dirty work.

我是一名火车司机，正如你所看到的，不可否认，这是一项非常脏的工作。

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"We don't often train to do it in an environment, what we call a dirty environment, where there is a radiological enemy here."

VOA: standard.2010.07.21

It goes out to the outside world, interacts,gets its hand and mind dirty, does work outside and then applies its work and learns from "the dirty experiences" and brings it back to the lab and so on and so on in an upward spiral.

而是走到外面的世界，与外界互动，接触那些“肮脏“事物，在外面工作，并吸取经验,从“肮脏经验“中学习“,将得到的经验带回实验室,诸如此类，就像一个上升的螺旋。

哈佛公开课 - 幸福课课程节选

Let's say that you live in an apartment that's getting really dirty

假设你住在一间环境比较脏乱的公寓。

I'm afraid of 课堂 - SpeakingMax英语口语达人

He has batted away all criticisms of the Albertan tar sands, where oil extraction is an especially dirty business, and placed his faith in carbon capture and storage, an unproven and expensive technology.

ECONOMIST: Canada's general election

The lows are low: 20-bucks-a-night affairs with an air conditioner, dirty towels and roaches as roommates.

FORBES: Magazine Article

When I interviewed Richie in the fall, I asked him if he worries about these lawsuits bringing an end to his dirty business.

FORBES: Fox13 Reporter Files $50 Million Lawsuit Against TheDirty.com Saying Nude Photos Aren't Hers