研究区域为珠江三角洲一条典型城市污染河道，采集了13个站位沉积物、上覆水、间隙水及底栖动物样品进行分析。
Samples of sediment, overlying water, pore water, and benthic invertebrate were collected at 13 stations along a typical municipal polluted river in the Pearl river Delta.
在世界上许多地方，别具特色的蛙声最近几年突然沉寂了。两栖动物目前正处于水深火热之中，三分之一的物种面临灭绝。
In many parts of the world, the characteristic 1 croaking has been suddenly stilled in recent years. 2 Amphibians are in serious trouble with one third of 3 species at risk of 4 extinction.
在世界上许多地方，别具特色的蛙声最近几年突然沉寂了。两栖动物目前正处于水深火热之中，三分之一的物种面临灭绝。
In many parts of the world, the characteristic 1 croaking has been suddenly stilled in recent years. 2 Amphibians are in serious trouble with one third of 3 species at risk of 4 extinction.
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