One must realize that it takes years for a planted tree to mature and years to clean out a polluted river.

人们必须认识到，一棵树要长大成荫得好几年，一条河要变干净也需要很多年。

youdao

A Hindu devotee wraps a piece of clothing around himself after a ritual dip in the polluted Yamuna river in New Delhi in 2010.

2010年，在新德里被污染的亚穆纳河里，一位印度教信徒在沁浸仪式后正在用布片包裹自己。

youdao

The factory has been dumping its waste in the river. As a result, the river is polluted.

该工厂一直将其废弃物倾倒在那条河里。结果，那条河被污染了。参考答案

youdao

They designed a large building that would clean a polluted river in Jakarta.

VOA: special.2010.03.31

The second was increased news reporting about a river so polluted that it caught on fire.

VOA: special.2010.04.21

Oriental Daily News says villagers attacked a fellow villager in Pailian, Zhejiang, after he had offered an environmental official money to swim in a polluted river.

BBC: China media: Egypt accident anger

Southern Metropolis Daily says officials must take action to clean up a polluted local river in Rui'an in Zhejiang province after entrepreneur Jin Zengmin offered 200, 000 yuan (32, 000 dollars) to any environment official willing to swim in the river for more than 20 minutes.

BBC: China media: Housing law anger

The video shows a small river with a yellow hue, allegedly polluted from the discharge of two companies nearby, one of them a suspected Apple supplier.

CNN: Apple rejects China pollution allegations