If mind-wandering were a slot machine, it would be like having the chance to lose 50 dollars, 20 dollars or one dollar. Right? You'd never want to play.
如果把走神看成一台老虎机，跟它赌只有三种结果 输50块，输20块 或者输一块钱。对吧？你肯定不想玩它。（笑声）