This section describes how to develop a client application that you can use to call the module you have just completed.
此部分描述如何开发可用于调用刚才完成的模块的客户端应用程序。
The figure shows how exports are an entry point from the outside world, while imports enable you to call outside the module.
该图表明，导出是外部的入口点，而导入则允许您调用模块外的功能。
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