Extended enterprise: Credit card approvals and charges, as well as any outsourced components such as shipping use these very common e-commerce functions.

扩展的企业(Extended enterprise)：信用卡的确认和支付以及送货等外包业务是非常常见的电子商务功能。

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It's very common to have many nested functions in a SELECT statement.

select语句中存在嵌套函数是非常普遍的。

youdao

A single module can perform more than one of these functions, though it's not very common.

单个模块可以执行多个这些功能，尽管它不是常见的。

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