They stop people from burning coalin houses and factories in the city, and from putting dirty smoke into the air.

他们阻止人们在城市里的房子和工厂里燃煤，阻止人们把脏烟排放到空气中。

youdao

When I picked up my son from preschool one recent summer afternoon, he looked dirty from head to foot.

近来一个夏日下午，我去幼儿园接儿子时，他从头到脚看起来都脏兮兮的。

youdao

Transactions requiring disk I/O, such as flushing dirty pages from the buffer pool or flushing logs from the log buffer, may wait.

要求磁盘 I/O 的事务，例如刷新缓冲池中的脏页或者刷新日志缓冲区中的日志，可能需要等待。

youdao

The water from the Mississippi River was too dirty.

VOA: special.2010.03.28

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

"Traditional environmental risks are those that face largely the poor in China, risks like drinking water contaminated with infectious organisms or highly polluted indoor air from people burning wood or other dirty fuels inside homes without chimneys."

VOA: standard.2010.04.07

It can transform dirty water from any source: rivers, oceans, and even raw sewage.

FORBES: Forget The Sequester: Entrepreneurs Are Saving The Future

Though in good spirits, all Mr Wei had with him was a battered suitcase full of his dirty laundry from prison.

ECONOMIST: China opens one prison door

Listen, when you work hard (and play hard) the way we do, your hands are going to get dirty from time to time.

ENGADGET