“positive economics”概念、定义、翻译-科学时代

单词	positive economics
释义	社会学词汇手册 positive economics 实证经济学
随便看	engine nozzle engine-off in flight engine of growth engine operability engine operating duration engine performance engine performance parameter engine performance test engine pit engine power engine reliability engine reliability test engine reverse thrust engineroom engine room engine solar oil engine specific impulse engine speed engine-speed method engine stability margin engine starting engine structure integrity programme engine test engine test bed engine test in the simulated altitude condition

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。