async transform(chunk, controller) {
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」，详情可参考谷歌浏览器【最新下载地址】
。搜狗输入法下载对此有专业解读
Boeldt believes government regulation is the only way to truly force companies to ensure the safety of their users online. “These companies aren’t held to a certain standard” that would stop children from accessing their platforms—not least of all, something these companies “benefit from with kids on their platform. More people, more ads.”，推荐阅读heLLoword翻译官方下载获取更多信息
但是“我们现在还没收到官方通知，也不敢乱猜”。
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