“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	sounder sounder key sound exposure level sound fade out and fade in sound field sound field, acoustic field sound field quantity sound flash back sound flash forward sound focusing sound funnel sound girder sound girder, sound crossbeam sound gloss sound grating sound-hard boundary sound horizon sound image sound image control sound in film & TV sounding sounding accuracy evaluation sounding balloon sounding board sounding datum

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