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近几年来,在地质学中正酝酿着一场新的变革。这就是对地质历史发展过程中灾变现象的新认识。地质界对这一问题展开了热烈的讨论。
In recent years, a new revolution is brewing in geology. This is a new understanding of the cataclysmic phenomena in the process of geological history. The geological community has heated discussions on this issue.