短語(yǔ)詞組短語(yǔ)background -noise ' s level 背景噪聲電平automatic background -noise control 背景噪聲自動(dòng)控制measuring background -noise level 背景噪聲電平測(cè)量background or bias -include noise 背景或偏移噪聲anti -background noise 抗背景干擾 返回 background noise