At first, the particle is considered as a highly aberrated spherical lens, so that its focal length is gained, and then the equivalent thin lens is found under the condition of the equal focal length and equal light distance.是什么意思_At first, the particle is considered as a highly aberrated spherical lens, so that its focal length is gained, and then the equivalent thin lens is found under the condition of the equal focal length and equal light distance.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句