“扁平的”用英语怎么说？

这个发现驳斥了地球是扁平的看法.This discovery disproved the idea that the world was flat.很久以前人们相信地球是扁平的.Long ago, people believed that the world was flat.古代人错误地认为地球是扁平的.The ancients were mistaken in their belief that the earth was flat...