Key words: Electron optics,Wide electron beam focusing,Curvilinear coordinate system,Concentric spherical system,Numerical computation,Aberration.是什么意思_Key words: Electron optics,Wide electron beam focusing,Curvilinear coordinate system,Concentric spherical system,Numerical computation,Aberration.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句