On midsagittal images, AP dural sac diameter and the upper-endplate angles of L1 and S1 were measured.是什么意思_On midsagittal images, AP dural sac diameter and the upper-endplate angles of L1 and S1 were measured.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句