The first step is to specify which APIs our application needs. This is done using an IDL called WIT. For our example, we need the Console API. We can import it by specifying the name of the interface.
11:47: A group of demonstrators finds a way around the cordon - the police, taken by surprise, abandon the barricade.
，更多细节参见heLLoword翻译官方下载
// Create a push stream，更多细节参见同城约会
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