“内三关”的概念、定义、翻译、参考文献-科学参考

单词	内三关
释义	内三关 Encyclopedia 历史学民族释 Inner Three Passes内三关中国古关合称，明代以北直隶（今河北、北京）境内沿内长城分布的居庸关、倒马关、紫荆关三关为内三关。
随便看	line-ellipse intersection Line Embroidery of Lotus and Mandarin Duck Book line emission line emission cloud line emission nebula line entity line equation line feed line flyback pulse line formation line frequency line geometry line graph line grating line group line identification Line Identifications of the Radio Astronomy Spectrum line image sensor line integral line intensity line intercept method line involution Line Islands line-item budget line jump scanning

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。