今天我们一起来看看@刘飞飞fly 提的话题：memory & forgetting things totally slipped my mind 彻底忘了 Hey Bai Jie, are we still getting lunch today? 嘿白洁，我们今天还一起吃午饭吗？ I have to go to class at noon. It totally slipped my mind. Sorry about that! 我中午要去上课。我彻底忘了，真抱歉！