この英文が分からん [無断転載禁止]©2ch.net

[0014 名無しなのに合格 2017/09/01(金) 11:10:29.90 ID:7zEf+5Ep]

These events occurred precisely at the same time as the period of most rapid expansion of the human brain.
これによるとasは接続詞らしい
https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q14120248364