老师让三位学生，用数百元只准买一样东西将一间屋子填满。第一个学生买了整整一屋子的棉花，但总有空隙。第二个学生买了很多蜡烛，但脚下总存在着阴影。第三个学生买了KF2，顿时房间被提着刀冲进来砍人的人和潮水般的差评填满了。

English Ver.
The teacher asked three students to fill a room with only one item for hundreds of dollars. The first student bought a whole house of cotton, but there was always a gap. The second student bought a lot of candles, but there was always a shadow. The third student bought KF2, and immediately the room was filled with a group of people holding knives and a flood of bad reviews.