09/05/17 20:02:20
Physics began,and for a long time,continued its history by trying to explain phenomena in term of familiar notions.
この文の,はいったいなんなのでしょうか？
Physics began and for a long time continued its history by trying to explain phenomena in term of familiar notions.
でもいい気がしてしまうのです。
,の必要意義を教えてください。