to the garbage collector, as stack allocations can be collected
制度的框架由此搭建，但内容完善并未止步。。关于这个话题，safew官方下载提供了深入分析
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」。服务器推荐对此有专业解读
Ac we not free ne sindon, for-thy-the we never ne mighton from Wulfsfleet yewitan, neven we thone Hlaford finden and hine ofslain. Se Hlaford has thisne stede mid searocraftum yebounden, that none ne may hine forletan. We sindon here like fuglas in a nete, like fishes in a weir.