短語詞組短語background reconstruction and update 背景重建與更新Background update and extraction 背景更新和生成background maintenance and update 背景維護(hù)與更新background update index option 或者使用后臺更新選項(xiàng)Background extraction and update 背景提取與更新ameliorative Surendra background update 改進(jìn)的Surendra背景更新selective background update 選擇性背景更新dynamic background update 動(dòng)態(tài)背景更新 返回 background update