要调用函数并使用它的返回值作为语言表达式的一部分，只需要命名它并附加一个使用圆括号括起的参数列表。
To call a function and use its return value as part of a larger expression, simply name it and append a parenthesized argument list.
添加附加存档信息的一个典型用例是将客户和订单号与作为客户通信一部分的每一封e - mail关联起来。
A typical use case for adding additional archiving information is the association of a customer and order number with every E-mail that is part of customer communication.
与现存的年代感的形象和语言形成对比，一个正式的宽敞的空隙作为附加部分的标志。
A formal and spacial clearance characterizes additions and expansions in contrast with the dated image and language from existing.
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