Tens of thousands of acres occur in continuous belts.

数万英亩的土地呈连续带状分布。

For millions of years now, both the Rivera and Cocos plates have been subducting beneath the North American Plate here which is what's generated this continuous belt of volcanoes clear across the center of Mexico.

数百万年来，里韦拉板块和科科斯板块一直在北美板块下方俯冲，因此形成了横跨墨西哥中部的连续火山带。