Typically, when there's something which is unclear you'll fill in the gap and figure out what the word is.

通常当你听到某些不清楚的单词时,你会填入间隔,并确认那个词是什么

耶鲁公开课 - 心理学导论课程节选

You can see that as you fill up your periodic table, it's very clear. But also we'll tell you a pneumonic device to keep that in mind, so you always remember and get the orbital energy straight.

在你们填周期表的时候，非常清楚但是我们也要告诉你们,一个策略去记住它，所以你们总是记得,并得到连续的轨道能量。

麻省理工公开课 - 化学原理课程节选