“i.e.”是拉丁词ID EST的缩写，它的意思是"that is"(那是)以及“in other words” (换句话说)。如：I went to my least favorite place (i.e., the dentist).释义：我去了我最不喜欢的地方（牙医）。
i．e．＝that is ／ in other words，用来进一步解释前面所表明的观点。i.e. 是拉丁语 id est 的缩写，意思是“那就是说、换句话说”，用来进一步解释前面所表明的观点。
举例：
Service charge is included in all prices, i.e., you don't have to leave a tip.
服务费都包含在价格里了，也就是说，你不用再付小费。
The hotel is closed during low season, i.e. from October to March.
这家旅馆在淡季，即从10月到3月，关门停业。
