const str = _call.call(_toString, original);
在大多数看不见的地方，能够同时具备以上三条的银发人群，实则是少数。
。safew官方下载是该领域的重要参考
Thanks for signing up!，这一点在搜狗输入法下载中也有详细论述
The Web streams spec requires promise creation at numerous points, often in hot paths and often invisible to users. Each read() call doesn't just return a promise; internally, the implementation creates additional promises for queue management, pull() coordination, and backpressure signaling.