短語詞組短語background traffic model 背景流量模型Universal background bigram model 全侷背景二元模型background extraction model 背景提取模型Background updated model 背景更新模型Gaussian background statistical model 高斯背景統(tǒng)計(jì)模型background field model 背景場(chǎng)模型background perception model 背景複襍度感知Background and model 背景和模型 返回 background model