“虚拟的”用英语怎么说？

这个故事是虚拟的.This is a fictitious story.由虚拟的或真实的一维空间所定义的空间区域。It is a spatial location defined by a real or imaginary unidimensional extent.他说终极原因纯粹是虚拟的说法.Final cause, he said, is pure metaphor....