v.忘掉；从脑中删除掉；去掉 ... 的弊习
It took him a long time to unlearn what he learned in his childhood. 经过很长时间他才忘却了儿童时代所学到的知识。
adj.无学问的；不熟练的；未学过的；不学而知的
unlearn的过去式和过去分词.
v.忘掉(清除掉；抛弃掉)
adj.不精通的(没有学习过的)
