首頁›Browse›S›sewer systemsewer system編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看sewer systemsewer system — 名詞名詞1. an underground network of pipes that carries waste water away1.名詞釋義下水道系統an underground network of pipes that carries waste water away例句The city is upgrading its old sewer system.