This is exactly what I was thinking recently.Since I started HT, it means I started studying English again, I don't think it's hard to memorize vocabulary.I think just like essay explained, I really want to improve and need to communicate with my friends who are native English speakers.
When I interpret, I have to memorize a lot of information( input), at the same time, I have to output( interpretation).But I realized that something was not interesting for me, I could forget quickly.(
必要な情報を取捨選択してふるいにかける機能). I think because of this functions, something is not important or not interesting information , I could forget it.