“positive externality”概念、定义、翻译-科学时代

单词	positive externality
释义	人口学词汇手册 positive externality 正外部性
随便看	mining area mining compass mining conditions mining cost mining district mining drainage mining economy mining effect mining engineer mining engineering mining engineering plan mining engineering plan mining equipment mining exercise mining explosive mining field mining geodesy mining geologist mining geology mining industry mining inspection mining institute mining intensity mining lease mining locomotive

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。