base metal 的英语意思
base metalˌbase ˈmetal noun [countable, uncountable] 
查看全部语言翻译 a metal that is not very valuable, such as iron or lead不太贵重的金属，如铁或铅
查看全部语言翻译 a metal that is not very valuable, such as iron or lead不太贵重的金属，如铁或铅 查看全部语言翻译 a metal that is not very valuable, such as iron or lead不太贵重的金属，如铁或铅