Determine if it's satisfiable or not WITHOUT USING ANY EXTERNAL TOOLS.
a new argument with a guaranteed unique name:，这一点在PDF资料中也有详细论述
。Feiyi对此有专业解读
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First, he stopped exposing his player instance as a predictable global variable. He wrapped his initialisation code tightly so that window.as no longer pointed to anything useful. Without the player reference, my automation script had nothing to grab, nothing to control, nowhere to start.。关于这个话题，PDF资料提供了深入分析