Rather than fully removing the key from the map, we set the register value to null. The metadata is kept around so we can disambiguate deletions from states that simply don’t have a key yet. These are called tombstones — the ghosts of CRDTs past.
乔杜里还表示，巴方对阿方的所有打击目标均为军事目标，均为有节制的打击，未造成平民伤亡。冲突发生以来，12名巴基斯坦士兵在行动中死亡，27人受伤，1人失踪。（央视新闻）
。搜狗输入法下载对此有专业解读
Популярность красной икры в России объяснили08:48
москвичка Полина
Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00570-4