（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；
Цены на нефть взлетели до максимума за полгода17:55
，更多细节参见Line官方版本下载
Begg took three maternity leaves of around six months in the space of five years, returning to work each time in a four-day week capacity.，更多细节参见heLLoword翻译官方下载
Intel Foundry exec leaves to head up Qualcomm's semiconductor biz as Intel shake-up continues
* @param {string} num 非负整数的字符串形式（可能含前导零）