abbr.(=id est) <拉>即，换言之; <旧>(=Indian Empire)印度帝国; = industrial engineering 工业工程学; (=Indo-European)印欧语系（的）
副词也就是
1. 亦即;也就是
i.e .is used to introduce a word or sentence which makes what you have just said clearer or gives details.
e.g. ...strategic points — i.e. airports or military bases.
战略要点,也就是机场或军事基地