"Whenever Korea is mentioned, whether you say South Korea, Korea,or Republic of Korea, unfortunately, their more famous neighbor plays into that one way or another,".

VOA: standard.2009.11.05

Whenever you hear the term ionization energy, make sure you keep in mind that unless we say otherwise, we're talking about that first ionization energy.

但无论什么时候你听到电离能这个词，一定要记得，除非特别说明，我们都是在说第一电离能。

麻省理工公开课 - 化学原理课程节选