Such raised earth parks are a low-cost solution to the tsunami danger in low-lying coastal areas. They use only local materials, provide a valuable community resource in normal times, and have the potential to save hundreds of thousands of lives when a tsunami strikes.
这样的高地公园是沿海低洼地区应对海啸危险的低成本办法。这种办法只需用到当地的材料，它们平时作为一种宝贵的社会资源，而海啸来袭时则可以挽救几十万条生命。