The reasons accountable for the decline of the fish resources are due to the low reproduction capacity and the long development time of the fish, overfishing and water pollution.
造成胭脂鱼资源下降的原因主要与其自身繁殖力低，发育时间长，以及过度捕捞和水域污染等因素有关。
Designing and constructing low pollution well sites is one of the most important environment protection measures taken in sensitive areas during petroleum exploration and development stage.
设计和建设低污染示范井位是敏感地区石油勘探开发重要的环保措施之一。
Diesel oil car is characterized by the low consumption of oil, low pollution emission and a bright future for development.
柴油车具有低油耗、排放小的特点，发展前景看好。
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