“principal root”的概念、定义、翻译、参考文献-科学参考

单词	principal root
释义	principal root [`prin·sǝ·pǝl `rüt] ^MATHEMATICS The positive real root of a positive number, or the negative real root in the case of odd roots of negative numbers.
随便看	quadric surface quadricycle quadridentate ligand quadrigeminal body Quadrijugatoridae quadrilateral quadrille paper quadrillion quadrinomial distribution quadriplegia quadripuntal quadruped quadruple-diversity system quadruple point quadruple thread quadruple vector product quadruplex circuit quadrupole quadrupole amplifier quadrupole field quadrupole lens quadrupole moment quadrupole spectrometer quad word quagmire

科学参考收录了103327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。