“three lines and four districts”的概念、定义、翻译、参考文献-科学参考

单词	three lines and four districts
释义	three lines and four districts Encyclopedia 农学三线四区释 three lines and four districts三线四区 “三线”包括城市开发边界、永久基本农田红线和生态保护红线。“四区”为“三界四区”的简称，主要指允许建设区、有条件建设区、禁止建设区和限制建设区。
随便看	period determination period discontinuity period domain period doubling period doubling bifurcation period-doubling bifurcation period-eccentricity period expense of books period gap period group period health examination periodic periodic acid periodic acid-Schiff reaction periodic acid-Schiff reaction (PAS reaction) periodical periodical bibliography periodical changes of endometrium periodical cicada periodical layout design periodically correlated periodically poled silica fiber periodical potential Periodical Publishers Association periodicals of ethnic medicine

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。