Marine dead zones form when nitrogen and phosphorus pollution concentrates in near-coastwaters through a process called eutrophication.
氮，磷污染通过被称为富营养化的这个过程，在近海岸水域集中泛滥，从而形成海洋死区。
2
The unusually high mortality rate among dolphin calves in the industrially contaminated waters along Florida's Gulf Coast is probably the result of their being poisoned by their mother's milk.
在佛罗里达海湾沿岸被工业污染的水域中，海豚幼崽异常高的死亡率可能是被它们母亲的乳汁毒害的结果。
3
Since the disappearance of sea urchins from the waters up the coast of South Florida, many coral reefs there have been smothered by the uncontrolled growth of algae.