1、The concept of Ursprache refers to the hypothetical ancestral language from which all modern languages are believed to have evolved.
（译：Ursprache的概念指的是假设的祖先语言，认为所有现代语言都是从它演化而来的。）

2、Linguists have been studying ancient texts and oral traditions in an attempt to reconstruct the Ursprache of humanity.
（译：语言学家们一直在研究古代文本和口头传统，试图重建人类的原始语言。）