The universal cover of the double doughnut is a hyperbolic space, where we only shrink the xy plane, but not the height
AI First有问题先问 AI，有需求也先提给 AI。我只愿意回答一些 AI 回答不了的问题，本文如此，其他情况亦然。
。Line官方版本下载对此有专业解读
Никита Хромин (ночной линейный редактор)
Marathon doesn’t put its backstory front and center; still, there's plenty of details on the factions if you want it, and it's all surprisingly interesting. This aspect reminded me of Concord, in which I found reading the in-game encyclopedia more fun than playing the actual game.
我提供给 AI 的信息不完全，给它造成了误导；