Rudna Glava (Ore Head) is a mining site in present-day eastern Serbia that demonstrates one of the earliest evidences of European copper mining and metallurgy, dating to the 5th millennium BC.http://www.
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。