短語詞組短語Look at the source 從源頭上看;分析pollutants at the source 源頭汙染物at its source 在源頭quality at the source 源流品質(zhì);質(zhì)量從源頭開始;源頭質(zhì)量;從根源上保証質(zhì)量management at the source 源頭琯理mechanism at the source 震源機理center at nearest Source 以最近源節(jié)點爲中心taxation at the source 根據(jù)收入來源課稅reduction at the source 減少來源 返回 at source