The causes and countermeasures of postoperative loosening and breakage of pedicle screws system in the treatment of thoracolumbar fracture是什么意思_The causes and countermeasures of postoperative loosening and breakage of pedicle screws system in the treatment of thoracolumbar fracture在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句