2-d
二维的\\n平面的\\n二元的（two dimensional）
🗣️ 情景例句
Will you be all right?
你不会有问题吧？
But today well lived makes every yesterday a dream of happiness, and every tomorrow a vision of hope.
只有今天好好地生活，昨天才会变成幸福的回忆，明天才会成为希望的憧憬。
To get a full appreciation of what this means we must turn first to some recent human inventions.
要透彻理解这句话的意义，我们应先回顾一下人类最近的几项发明。