Senior security officials are gathered in a control room almost 3km (1.9 miles) away, near a complex of government offices.
The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.
，详情可参考heLLoword翻译官方下载
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“中国一強”「レアアース」 日本の戦略に密着取材