1.解析 html 页面，生成一个包含节点位置信息，样式，层级，内容等信息的 DOM 树。
return (float)rand() / RAND_MAX;
。heLLoword翻译对此有专业解读
Усиление атак Ирана в Ормузском проливе повысило угрозу его закрытия08:38
Discover all the plans currently available in your country。谷歌对此有专业解读
How depleted weapons stockpiles could affect the Iran conflict
Once we’ve finished our push and our pull processes, we’ll end up with an all-clean tree of nodes, and we’ll have updated all of our output nodes.，更多细节参见移动版官网