“principal ray”的概念、定义、翻译、参考文献-科学参考

单词	principal ray
释义	principal ray Physics 光学、声学光学 chief ray, principal ray主光线 principal ray主光线^† Mathematics principal ray主射线
随便看	stepping stone stepping test step point step potential step potential difference step process step profilometer step pulley step pulse step resistance step response step response method step response of excitation control system step rocket step search method step sequence step servo system step size step size in search step size; step width step stress test step type optical fiber step-type optical fiber step-up operator step-up substation

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。