* @param {string} num 非负整数的字符串形式（可能含前导零）
Жители Санкт-Петербурга устроили «крысогон»17:52
。爱思助手下载最新版本是该领域的重要参考
Сайт Роскомнадзора атаковали18:00。快连下载安装是该领域的重要参考
And conversely, if I want to revert the modifications, that’s also possible:
"On the one hand, he says that the impact of data centres on his government's binding climate targets is 'inherently uncertain'.