短語詞組短語backward d motion 逆向運(yùn)動(dòng)backward motion estimation 前向運(yùn)動(dòng)估計(jì)anti -backward motion 防后溜backward motion latch 擋彈機(jī)構(gòu)backward motion vector 反向移動(dòng)向量 返回 backward motion