For example, system designers could create an internal interface package to utilize third-party billing code but only expose interfaces to those packages that use the billing code.

例如，系统设计师可以创建一个内部接口包来利用第三方记帐代码，但是只对这些使用记帐代码的包公开接口。

Not only does the dao package now directly utilize a third-party billing package, but another package that wasn't even intended to use any billing code directly references both billing packages!

现在不仅 dao 包直接利用第三方记帐包，而且另一个甚至不想直接使用任何记帐代码的包也引用了这两个记帐包！

Advanced platforms that have a limited instance-level ability to provide metering and billing often opt to provide generalized billing models in which there is a flat fee to run application code.

在计费和计量方面存在实例层功能局限的高级平台，会选择提供通用计费模式，这种模式在运行应用程序代码时会产生固定费用。

Before making changes to the internal billing package, you could analyze a code coverage report to determine if any tests actually tested the package.

在对内部记帐包作出变更前，您可以分析代码覆盖率报告，以确定是否有任何测试真正测试了这个包。

The country fields for billing and shipping contain a two-letter country code such as DE for Germany or US for the United States.

用于支付和运送的country字段包含一个两个字母的国家代码，例如DE表示德国，或者US表示美国。