“东北封禁”的概念、定义、翻译、参考文献-科学参考

单词	东北封禁
释义	东北封禁 Encyclopedia 历史学历史事件释 Qing Government’s Block Policy of Northeast China东北封禁清军入关后，为实行民族等级与隔离制度，严禁汉人进入满洲“龙兴之地”垦殖，颁布禁关政策。
随便看	bridge corridors were erected across the river by columns bridged carbocation bridge deck pavement bridge design standard bridge design theory bridged graph bridged heterocyclic compound bridged metallocene catalyst bridged metallocene catalyst; ansa-metallocene bridged ring system bridged-ring system bridge engineering bridge engineering geology bridge engineering survey bridge erector for track beam bridge fault bridge foundation bridge foundation soil bridge guard rail bridgehead atom bridge health monitoring bridge hydrology bridge index bridge inspection working platform bridge knot

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。