In some cases, it is perfectly acceptable to assume a flatmodel of the Earth and lose some accuracy in exchange for speed.
在一些情况下，完全可以采用平面地球模型，通过牺牲一些精确性来获取速度。
2
It transforms the flat, character-based state representation from the URL into a hierarchical object representation (the document model introduced above).
它会将普通的基于字符的状态表示形式从url转换为层次结构对象表示形式(上面介绍的文档模型)。
3
As we build globally integrated enterprise, our communications are constrained by the flat, print-based model of today's Web.