Alvin didn't need to explain to us what was going on at the time in the '60s and the '70s; it was obvious why were doing his work.
저희에게 앨빈이  설명할 필요도 없었죠. 1960년대와 1970년대에 무슨 일이 일어나고 있었는지요. 그가 왜 이런 일을 하고 있는지 너무나 명백했으니까요.