“城市等级”的概念、定义、翻译、参考文献-科学参考

单词	城市等级
释义	城市等级 Encyclopedia 工学总论释 city hierarchy城市等级在区域城市体系中，按照城市人口规模排列成的顺序体系。
随便看	ring of Witt vectors Ring of Youth ringoid Ringo Lam ring olefin metathesis ring opening copolymerization ring-opening isomerization polymerization ring opening metathesis polymerization ring-opening metathesis polymerization ring opening metathesis polymerization (ROMP) ring-opening metathesis polymerization (ROMP) ring opening polymerization ring opening reaction ring operation ring(or circular) collider ring-oven technique ring pillar ring plain ring-plane crossing ring radio telescope ring regular sequence ring resonator ring reversal ring reversal; ring inversion ring rolling

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。