求翻译：在过去的50年里，尼日利亚的尼日尔三角洲上开采提炼的原油和天然气对少数特权阶级意味着财富，但给民众和环境带来了沉重的代价。尼日利亚是世界上第八大原油生产国，但它却是世界上最贫穷的国家之一。据估计，在全部人口中约有70%的民众都生活在贫困线以下。是什么意思？

In the past 50 years, Nigeria's Niger Delta, mining refining of crude oil and natural gas means that the wealth of the privileged few, but a heavy price to the public and the environment. Nigeria is the world's eighth largest crude oil producing countries, but it is one of the world's poorest countr

In the past 50 years, Nigeria's Niger Delta region on 3 mining extraction of crude oil and natural gas to a few privileged class means that wealth, but to the people and the Environment has taken a heavy toll. Nigeria is the world's largest crude oil production at the 8 state, but it is one of the p

In the past 50 years, on Nigeria's Niger delta mined the refinement the crude oil and the natural gas meant to the minority privileged class wealth, but has brought the heavy price for the populace and the environment.Nigeria is in the world the eighth big crude oil producer country, but it is actua

In the past 50 years, mining extraction in the Niger Delta of Nigeria's crude oil and natural gas on a small number of privileged means of wealth, but a heavy cost to the people and the environment. Nigeria is the world's eighth-largest crude oil producer, but it is one of the poorest countries in t

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