For example, it is possible to express that InvoiceType (type of Invoice number) cannot be subtyped, that is, no one can define a new version of InvoiceType.

比如，有可能表示InvoiceType (Invoice编号的类型)不允许子类型化，任何人都不能定义新版本的InvoiceType。

youdao

And this implementation is closed: After you compile the FulfillmentGenerator class, you can't extend the invoice method to new types without editing the source code and recompiling.

此实现是封闭的：在您编译FulfillmentGenerator类以后，在不编辑源代码和重新编译的情况下，您无法将invoice方法扩展到新的类型。

youdao

In addition to the quantity ordered field on sale order lines, you have three new fields: Qty Delivered, Qty Invoiced, Qty to Invoice.

销售订单行增加了3个新的字段：已交付数量，已开票数量，需开票数量。

youdao

That new company would then be free to invoice "services with regards to consultancy" to the company that originally paid the executive his bribe.

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Power and Associates says 62% of new-car buyers first consult the Internet for invoice prices, sticker prices and trade-in values.

FORBES: Dealers 1 Internet 0