“Petty-Clark's Law”的概念、定义、翻译、参考文献-科学参考

单词	Petty-Clark's Law
释义	Petty-Clark's Law Encyclopedia 经济学工业行业结构释 Petty-Clark's Law配第-克拉克定理有关经济发展中就业人口在三次产业中分布结构变化的理论。
随便看	contact circuit contact copying contact curve contact dermatitis contact discontinuing contact discontinuity contact drum contact drying contact electrical phenomenon contact electromotive force contact element contact EMF contact engaging and separating force contact fatigue contact force contact form contact geometry contact gettering contact grouting contact-induced language change contact inhibition contact interaction contact ion pair contact ion pair; intimate ion pair; tight ion pair contact irradiation

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。