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。91视频对此有专业解读
import { Scene, Circle, Square, Create, Transform, FadeOut } from 'manim-web';，更多细节参见雷电模拟器官方版本下载
Web streams use a locking model to prevent multiple consumers from interleaving reads. When you call getReader(), the stream becomes locked. While locked, nothing else can read from the stream directly, pipe it, or even cancel it — only the code that is actually holding the reader can.