“封闭人口”的概念、定义、翻译、参考文献-科学参考

单词	封闭人口
释义	封闭人口 Encyclopedia 法学人口学方法释 Closed Population封闭人口在一定地域范围内，既无迁入也无迁出的人口，人口规模的变化完全取决于出生和死亡因素的人口类型。
随便看	fruit tea fruit tree fruit tree asexual hybridization breeding fruit tree clonal rootstock fruit tree container seedling fruit tree cross breeding fruit tree cultivation system fruit tree culture fruit tree intermediate stock fruit tree introduction fruit tree planting density fruit tree planting technique fruit tree ploidy breeding fruit tree propagation fruit tree propagation by seeds fruit tree removing rootstock buds fruit tree rootstock fruit tree tissue culture seedling fruit tree training andpruning fruit tree wild relatives Fruit Vegetable Fresh Keeping Handbook fruit vinegar fruit wine Frumkin correction FRUMP natural language understanding system

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。