短語(yǔ)詞組短語(yǔ)background d value 背景值background color value 背景顏色值background difference value method 背景差值法background and value of education 教育背景與價(jià)值environmental background value [環(huán)境]環(huán)境背景值;環(huán)境本底值;環(huán)境配景值ronmental background value 環(huán)境背景值cs background value cs 背景值precipitation background value 降水背景點(diǎn) 返回 background value