translation.en: And NAND2Tetris became one of the first massive, open, online courses, although seven years ago we had no idea that what we were doing is called MOOCs.
translation.zh: 同时NAND2Tetris 成了第一批 大规模的、 开放的、 在线课程之一 虽然 7 年前我们还不知道我们在做的 东西被叫做MOOCs。