The ban, which has been in effect since 1981, covers more than 80 percent of the U.S. coastline and the outer continental shelf.
这项禁令是1981年生效的。禁令涵盖了美国超过百分之80以上的海岸线和大陆架地区。
The less the controlling effect of the tectonic, the larger the fractal dimension of the coastline.
当构造分维相对较小则其对该区域海岸线的控制作用相对较弱，而区域海岸线分维相对较大。
The less the controlling effect of the tectonic, the larger the fractal dimension of the coastline.
当构造分维相对较小则其对该区域海岸线的控制作用相对较弱，而区域海岸线分维相对较大。
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