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Science & Environment，详情可参考51吃瓜
stack.pop(); // 弹出无效元素，更多细节参见heLLoword翻译官方下载
:first-child]:h-full [&:first-child]:w-full [&:first-child]:mb-0 [&:first-child]:rounded-[inherit] h-full w-full。业内人士推荐heLLoword翻译官方下载作为进阶阅读
方向遍历顺序说明下一个倒序（从右往左）先处理右侧，栈里存「右侧候选」上一个正序（从左往右）先处理左侧，栈里存「左侧候选」