nd it was no big deal.Merlin's illness is serious, but it does not last long, at least when it is not mentioned in the real world, it can communicate normally, so there is no need to worry too much. T...轉碼失敗！請您使用右上換源切換源站閱讀或者直接前往源網站進行閱讀！does the hot air flow rise This is because the density of the hot air is low, the energy is high, and the molecular spacing is large; why does heat increase the molecular spacing This is because. ""st...