automate the process of writing code and make it more accessible to
HTMLMediaElement: playbackRate property — MDN Web Docs
。Line官方版本下载对此有专业解读
"To have that signal, you need that infrastructure, and that's where the planning system comes into play," Elliott says.
// 记录答案：栈顶就是「当前元素右侧第一个更大值」（易错点3：别写反判断）