Jane Lubchenco, a marine ecologist from Oregon State University, says this nutrient run-off from land is increasing the number, size, duration and severity of the dead zones.

• Oregon州立大学海洋生物学家JaneLubchenco说这些陆地排出的营养物质正在增加“死寂之区”的数量，规模，持续的时间以及其严重性。