Picture a pot on the heat. For a long time nothing seems to happen: the water just gets warmer and warmer, quietly. Then it arrives at one exact temperature and stops being quiet — it boils. The word names that one point on the way up, and both of its uses are about the same thing: the moment when rising heat finally shows.
可以想成爐子上的一鍋水。前面很長一段時間好像什麼都沒發生，水只是安安靜靜地愈來愈熱。到了某一個溫度，它就再也安靜不下去，開始滾了。這個字指的就是那一個點。兩個意思講的其實是同一件事：一路加溫，終於藏不住的那一刻。
登入就可以看每一支怎麼連回核心畫面。