教授在教桌上放了一个罐子,然后拿出一个拳头大小的鹅卵石,正好能从罐口放进罐子。教授把它放进去后,问他的学生:“你们说,这罐子现在是不是满的?”“是……”下边有几个学生回答说。“真的吗?”教授笑着从教桌底下拿出一袋碎石子。把碎石子从罐口倒下去,摇一摇,再加一些,然后 The professor put a jar on the teaching table, and then took out a fist-sized pebble, just to be able to put the jar into the jar. After the professor put it in, he asked his students: “You said, Is this jar full now?” “Yes...” A few students answered. “Really?” Professor laughed and took out a bag of gravel under the desk. Grab the gravel from the mouth of the tank, shake it, add some more, then