In linguistics, a sprachraum (; , "language area") is a geographical region where a common first language (mother tongue), with dialect varieties, or group of languages is spoken.
Sprachraum:
From German Sprachraum.
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。