It was a little golden thread running through the dark web of his present fortunes; which were growing ever gloomier and more gloomy.
这是一条细小的金线，贯穿着他目前命运的黑暗之网；越来越阴沉。
英语百科
Dark web
The dark web is the World Wide Web content that exists on darknets, overlay networks which use the public Internet but which require specific software, configurations or authorization to access. The dark web forms a small part of the deep web, the part of the Web not indexed by search engines, although sometimes the term "deep web" is confusingly used to refer specifically to the dark web.