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.
刘年丰：操作的核心是操作对象，但以前的主流模型太关注全局信息。我们的思路是：通过多个二维热力图，把要操作的对象位置自适应地学习出来，让模型意识到什么是最需要响应的操作对象。。91视频是该领域的重要参考
Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08。业内人士推荐同城约会作为进阶阅读
A major construction project like this takes time, effort and money.