短語(yǔ)詞組短語(yǔ)double envelopment 兩面包圍;雙面包抄envelopment tendency 發(fā)展趨勢(shì)date envelopment 數(shù)據(jù)包絡(luò)Envelopment u 環(huán)繞感listening envelopment 聽包被感envelopment rate 包封率envelopment ratio 包封率envelopment protection 環(huán)保site envelopment 釋義包膜位置 返回 envelopment