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
a. 有学问的, 学术上的
learn的过去式和过去分词