“BBB”概念、定义、翻译-科学时代

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

单词	BBB
释义	财政学词汇手册 BBB （信用等级）中等风险的
随便看	rare-earth fast ion conductor rare-earth garnet phosphor rare-earth ion rare-earth laser crystal rare-earth lubrication material rare-earth material rare-earth metal rare earth metal rare earth metal rare-earth orthoferrite magnetic bubble material rare-earth oxysulfide rare-earth permanent magnet rare-earth permanent magnet material rare-earth-transition metal amorphous magneto-optical material rare earth treatment rare element rare elements rarefaction rarefaction region rarefaction wave rarefaction wave rarefaction wave R/A (refer to acceptor) rarefied aerodynamics rarefied air

BBB