Credit card information was to be passed to an external system, so we had to ensure we at least had a valid number.
信用卡信息要传递到外部系统，所以我们必须确保至少有一个有效号码。
In the last column in the UML workbook series, we devised a system that would interact with both a human actor (a loan applicant) and an external system actor (a credit bureau).
在UML工作簿系列的前一个专栏中，我们设计了一个既能与参与人(贷款申请人)又能与外部系统参与者(征信所)交互的系统。
The carrying out credit system is a systems engineering, Involves to many factors, School internal condition and the social external condition are practice the credit system the premise.
推行学分制是一项系统工程，涉及到诸多因素，其中学校内部的条件和社会外部条件是实行学分制的前提。
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