a. 有学问的, 学术上的

learn的过去式和过去分词

v gain knowledge or skills

v get to know or become aware of, usually accidentally

v commit to memory; learn by heart

v be a student of a certain subject

v impart skills or knowledge to

v find out, learn, or determine with certainty, usually by making an inquiry or other effort

s having or showing profound knowledge

s highly educated; having extensive information or understanding

a established by conditioning or learning