1. A method of generation text script of high efficiency, said method comprising: selecting N 1 sentences with best integrated efficiency from a source corpus comprised by at least a sentence and resulting N 1 sets, wherein each set of said N 1 sets comprised by at least a sentence; repeating procedures for generating text script of high efficiency until satisfying a termination criterion, said procedures comprising: deleting the sentences in said N i sets from said source corpus and resulting N i corpora; selecting M i&plus;1 sentences with best integrated efficiency from each of said N i corpora and resulting N i &plus;M i&plus;1 sets; and selecting N i&plus;1 sets with best integrated efficiency from said N i ×M i&plus;1 sets; when a termination criterion satisfied, said N i&plus;1 sets being said text script of high efficiency, otherwise said N i&plus;1 sets replacing said N i sets. wherein i meaning an i th procedure, i&equals;1, 2,... ; N i&plus;1 being a number of said selected sets with best integrated efficiency in said i th procedure; M i&plus;1 being a number of said selected sentences with best integrated efficiency from a N i corpuse; Mj and Nj being an integer and greater than one, j&equals;1, 2,... ; and said integrated efficiency being decided upon a integrated efficiency function that comprising reciprocals of total unit instances of said N i corpuses.