We need clean air, but unfortunately, air pollution is generally present, especially in cities。

我们需要清新的空气，但遗憾的是，空气污染普遍存在，在城市中尤其如此。 [分析] 本句为了避免“尤其是在城市里”的表达不完整，增加了“如此”。

youdao

We need clean air, butunfortunately, air pollution is generally present, especially in cities.

我们需要清新的空气，但遗憾的是，空气污染普遍存在，在城市中尤其如此。

youdao

We need clean air, but unfortunately, air pollution is generally present, especially in cities.

我们需要清新的空气，但遗憾的是，空气污染普遍存在，在城市中尤其如此。

youdao

"And we need to clean up so that they can come and build new residential places for our families here."

VOA: standard.2009.10.04

I just need to clean the dishes, before I come over.

在我来之前，我还得把盘子刷了。

I will实战 - SpeakingMax英语口语达人

Responding to the need for safe, clean and affordable lighting, Irvine-Halliday set to work on a solution.

VOA: standard.2009.12.13

People need it to drink, and they also need clean water to wash their hands.

FORBES: Clean Water Will Be Vital In Japan

We need clean water not only to sustain ourselves, but also for other basic necessities such as farming and sanitation.

FORBES: Investors Are The Key To Solving The World's Water Problems

We need clean coal in the U.S., and melding the technology with oil recovery is a smart way to make it economic.

FORBES: Sinopec's Clean Coal Plan Shows It's Set To Buy Chesapeake's Texas Oil Fields