Secondly,we discuss three types of background.The software-LOWTRAN7 can be used to get the radiance of the background and the permeating rate.是什么意思_Secondly,we discuss three types of background.The software-LOWTRAN7 can be used to get the radiance of the background and the permeating rate.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句