A world with two lines removed. Now there are two ways (red and blue) for a leash to get tangled up and “all their combinations” (there are two generators of the fundamental group of this space)
Unix pipes are perhaps the purest expression of this idea:
。夫子对此有专业解读
南方周末：本轮以伊军事冲突爆发后，外界最关注的莫过于冲突的持续周期。你判断这场冲突会延续多久？以色列是否会发起第二轮打击？，更多细节参见WPS下载最新地址
Фото: Sergey Elagin / Global Look Press，更多细节参见搜狗输入法2026