（三）在铁路、城市轨道交通线路、桥梁、隧道、涵洞处挖掘坑穴、采石取沙的；
The problem gets worse in pipelines. When you chain multiple transforms – say, parse, transform, then serialize – each TransformStream has its own internal readable and writable buffers. If implementers follow the spec strictly, data cascades through these buffers in a push-oriented fashion: the source pushes to transform A, which pushes to transform B, which pushes to transform C, each accumulating data in intermediate buffers before the final consumer has even started pulling. With three transforms, you can have six internal buffers filling up simultaneously.，更多细节参见heLLoword翻译官方下载
。关于这个话题，WPS官方版本下载提供了深入分析
进山那天，宜昌大雨。朝新和带路的果农便踩水前行，水深，鞋里很快就进了水，他们索性脱掉了鞋袜，赤脚蹚水前行。小雨中，褚朝新看到了花果同枝的“伦晚”！漫山遍野都是脐橙，除了“伦晚”，其他品种的果子早已摘完，只剩下满树的白色橙花，整个山里都弥漫着橙花香。
static void oops(int s,siginfo_t *p,void *x){，这一点在safew官方版本下载中也有详细论述