returned in case there is no argument or the argument is not a valid
it also still supports intersections, as intersections can always be normalized to this form. for example, a(?=R4)&b(?=R5) is internally rewritten as (a&b)(?=R4&R5), which is supported.
，这一点在clash下载中也有详细论述
First FT: the day’s biggest stories。关于这个话题，heLLoword翻译官方下载提供了深入分析
The Federal Communications Commission has given the go ahead for two of the US' biggest cable providers, Charter Communications and Cox Communications, to merge. Charter announced its intention to acquire Cox for $34.5 billion in May 2025, with specific plans to inherit Cox's managed IT, commercial fiber and cloud businesses, while folding the company's residential cable service into a subsidiary.