“Petzval curvature”的概念、定义、翻译、参考文献-科学参考

单词	Petzval curvature
释义	Petzval curvature [`pets·väl `kǝr·vǝ·chǝr] ^OPTICS The axial curvature of the image of a plane object produced by an optical system, equal to the sum over all the optical surfaces in the system of R(1/n' - 1/n ), where R is the curvature of the surface, and n and n' are the refractive indices before and after the surface. Also known as Petzval sum.
随便看	nonmultiple switchboard nonnegative semidefinite non-Newtonian fluid non-Newtonian fluid flow non-Newtonian system non-Newtonian viscosity nonnitroglycerin explosive nonnumeric character nonnumeric programming nonodontogenic cyst non-ohmic nonoic acid nonorientable surface nonosteogenic fibroma nonparalytic poliomyelitis nonparametric statistics nonpareil nonpenetrative nonpermissive cell nonpersistent war gas nonplunging fold nonpoint source nonpolar nonpolar bond nonpolar covalent bond

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。