“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	material for reactor control material for vacuum electronic device material foundation of socialism material genetic engineering material grinding material handling at construction site material handling facilities of concentrators material handling system material handling system planning material hemolysis material hoist material host response material immune response material implication material inflammatory reaction material intrinsic length material irritation materialism Materialism and Empirio-criticism materialism of the old type materialist conception of history materialistic criminal psychology materialistic education Materiality materiality

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。