background pollution

基本解释

The article introduces the fitness and evolution of creatures and the harm from pollution background.
主要就污染物对动物、植物及人体健康的危害，以及在污染条件下生物的适应与进化作一综述。
BACKGROUND: Environment pollution due to lead is severe day by day, and the lead-induced developmental toxicity of central nervous system is prominent.
背景：环境铅污染日趋严重，铅致中枢神经系统发育的毒性较为突出。
Based on the analysis of the malodorous black water bodies' background, the serious organic pollution of rivers and obvious tendency to eutrophication were demonstrated.
根据对其黑臭的背景分析，发现水体有机污染较严重，河道富营养化趋势较为明显。

These were chosen to minimise the confusing effects of background pollution that might be found in more densely populated and highly industrialised areas.
ECONOMIST: Weather and pollution