The deterioration of the ecological system is accelerating because of the dramatic increase of human production and consumption.

由于人类生产和消费活动的急剧增加，生态系统正在加速恶化。

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The ecological system can recycle by itself.

生态系统本身就可以循环。

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Water is an important part in ecological system.

水是生态系统的重要组成部分。

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He says the global economy must change to a sustainable system now before social issues and ecological degradation become overwhelming.

VOA: standard.2010.01.23

Through their livelihoods based on slash and burn agriculture, fishing and hunting, they have both shaped the local ecological system and sheltered it from destruction.

UNESCO: EDUCATION

Though foxes are of recent introduction in Australia (having been brought for sport by British settlers), many marsupial predators, now extinct, were present before the arrival of man in both his Aboriginal and his European forms, so the ecological system of plants, herbivores and carnivores in the eucalyptus forests would probably not have been that different in the evolutionary past.

ECONOMIST: Ecology raids the techniques of chemistry

"You basically have two ecological universes - a system with dingoes and a system without dingoes - they are completely different places, " Dr Letnic told BBC News.

BBC: Dingoes 'could help rare species'