“Records of Yongding River”的概念、定义、翻译、参考文献-科学参考

单词	Records of Yongding River
释义	Records of Yongding River Encyclopedia 工学〔中国水利史文献〕释 Records of Yongding River《永定河志》中国清代记载中国永定河的志书。
随便看	positive eyepiece positive feedback positive feedback amplifier positive film positive flower structure positive formula positive function positive functional positive fundamental sequence positive glow positive Grassmannian positive half-trajectory positive helicity spinors positive Hermitian kernel positive Hermitian operator positive homogeneous function positive hull positive image positive index of inertia positive infinity positive integer positive integral kernel positive interaction between nutrients positive ion positive ion, cation

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。