In an irritated voice, they said, "You've given us a machine that works only in English, so we had to teach ourselves English in order to use it."  That's the first time, as a teacher, that I had heard the word "teach ourselves" said so casually.
不機嫌な口調で 「このマシンが 英語でしか動かないから 仕方なく独学で英語を覚えたよ」  教師として あんなに平然と 「独学」なんて言われたのは 初めてでした