基本解释[金融] 未確認信用証；[金融] 不保兌信用証词组短语短語unconfirmed E letter of credit 未確認信用証unconfirmed U letter of credit 未確認信用証an unconfirmed letter of credit 未經証實的謠傳unconfirmed letter of credit更多词组专业释义經濟學不確認信用証非保兌信用証未確認信用証不保兌信用証