We promise to keep the environment clean.

我们许诺保持环境干净。

youdao

Friends of the Earth help to keep the environment clean.

地球的朋友帮助保持环境干净。

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It's important for us to keep the environment clean.

对于我们来说保持环境清洁是重要的。

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Organizers say another aim of the walk is to recruit members of different faiths to join forces in community service projects to clean the environment and help the poor.

VOA: standard.2009.10.19

The financing environment for clean tech companies is tough today, given the negative fashion sentiment, but good companies with highly differentiated technologies are getting funded.

FORBES: The Big Green Opportunity: Transforming Clean Tech Into "Main Tech"

Throughout the next decade major trends through an intermix of the life sciences and information technology will involve increasing use of biotechnological processes in understanding life, eradicating hereditary diseases, developing novel bio-industries, and furthering the uses of biomedical products in conserving the quality of life and the environment through the promotion of clean technologies.

UNESCO: Basic Sciences

Chemicals specialists were called in, with the Environment Agency carrying out the clean-up.

BBC: Chemicals on M25