A few of them are almost certainly shortcomings in Ostrich, while others seem to intend to match literal full strings, like ^(로그인하지 않고)$ ("without logging in"). Presumably they're from internal use.
Украина использовала трубопровод «Дружба» для прокачки своей нефти. Об этом стало известно источникам Reuters.。Line官方版本下载是该领域的重要参考
Get editor selected deals texted right to your phone!，更多细节参见体育直播
Up to 10 simultaneous connections。体育直播对此有专业解读