短語詞組短語double envelopment 兩麪包圍;雙麪包抄envelopment tendency 發(fā)展趨勢date envelopment 數(shù)據(jù)包絡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