“Public English Test System”的概念、定义、翻译、参考文献-科学参考

单词	Public English Test System
释义	Public English Test System Encyclopedia 文学〔英语考试〕释 Public English Test System；PETS全国英语等级考试中国教育部主管的一项全国性标准化社会性考试。
随便看	proper mapping proper mass proper modification proper morphism proper motion proper motion group proper motion in declination proper motion in right ascension proper motion member proper motion membership proper motion star proper name proper name of a function proper natural number proper nilpotent element proper node proper non-inferior solution proper nonvoid subset proper number proper open covering proper order dictionary proper orthochronous Lorentz group proper orthogonal group proper orthogonal mapping proper orthogonal matrix

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。