The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
return _apply.call(origAppend, this, arguments);
，详情可参考WPS官方版本下载
因此AI是否融入银发族的实际生活、产生看得见的价值，依旧要打上一个问号。
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