@RokoMijic Meanwhile, I've just been using the word "book" to refer to long PDF and EPUB files since like 2010, and occasionally get really confused when people ask me whether or not carrying my books makes my bag heavier.
@RokoMijic与此同时，从2010年开始，我就用“书”这个词来指代长PDF和EPUB文件，当人们问我是否带着书会让我的包更重时，我偶尔会感到困惑。