What is the purpose of reconstruction in historica

正确答案：Historical linguists aim at establishingthrough the method of comparative reconstructionthe genetic relationship between and among various languages based on the evidence of systematic form-meaning resemblance in cognate itemsand thereby to reconstruct the protolanguage of a language family． 作为历史语言学的目标以多种不同的语言中的同源词项在形式一意义方面系统的相似性的证据为基础通过比较重建法确定这些语言之间的亲缘关系从而重新构建一个语系的原始语。
Historicallinguistsaimatestablishing,throughthemethodofcomparativereconstruction,thegeneticrelationshipbetweenandamongvariouslanguagesbasedontheevidenceofsystematicform-meaningresemblanceincognateitems,andtherebytoreconstructtheprotolanguageofalanguagefamily．作为历史语言学的目标,以多种不同的语言中的同源词项在形式一意义方面系统的相似性的证据为基础,通过比较重建法,确定这些语言之间的亲缘关系,从而重新构建一个语系的原始语。