意思：尚欠余額；不定額。
發音：[英][?b?l?ns dju:][美][?b?l?ns du]
雙語例句：
The application program asks the DBMS for data by field pine, for example, I coded representation of "give customer name and balance due" would be sent to he DBMS.
例如，壹個有代碼鴨表達式“將客戶名稱和應付余額給我”會被送進數據庫管理系統中。