After surgery on 16 patients with iatrogenic AVN of femur head in DDH, according to the grading standard by Zhang and Dai the final results can be divided as excellent in 2case(12.5%),good in 6 cases(37.5%)and poor in 8(50%).是什么意思_After surgery on 16 patients with iatrogenic AVN of femur head in DDH, according to the grading standard by Zhang and Dai the final results can be divided as excellent in 2case(12.5%),good in 6 cases(37.5%)and poor in 8(50%).在线翻译_英语_读音_用法_例句