some sort of consensus

i am usually dependent on people around me so i memorize his/her habit
so that i can easily estimate what they are trying to do or what is in their mind

i need to communicate with them regularly to keep the memory of their habits
as i think habit or something like that needs daily update
memories fade gradually when i become distant to the person

once i meet him/her after a long time i can remember that i had a memory for them before
but i cannot comprehend their behaviour like that time
it is like when i hear or read something in a foreign language
which i had learned but already passed away from my mind

一旦誰かの癖とか特徴を覚えてからその人と疎遠になって、しばらく経って再会した時
何かの行動がその人の癖だったのは思い出せても、それがどういう意図だったかまでは
思い出し切れなくて、一回勉強したけど忘れてしまった外国語みたいに感じるという内容のはず。
何か意味はあったはずなのに、どう解釈していいのか思い出せない。