A young college student thought that he chose the wrong major(专业) at a common college, so he drank every day and didn't study at all. He became more and morefrustrated.
But he never missed Professor Yang's biology class. He liked the course. Besides, Yang's class was so interesting that he always listened carefully, never caring about whether the other students were paying attention or not in class.
Once he put a note in the homework he handed in. saying "Professor, it is said that today's college students are cheaper than potatoes. Do you agree?"
That day Professor Yang called for him after class. When he came, he found the professor at a table with food on it. They drank happily over their meal.
When they became half drunk, the professor presented a small potato that was sprouting (发芽的). "Do you know how much this costs?" lie asked the young man. " It's soft but poisonous (有毒). Nobody will take it even if it's free." He then threw the potato away.
The professor then showed him another potato. It was half the size of a football and perfectly round. "This potato is organic (有机的). It is not only large and fresh but also free of pollution, People are in need of such kind of potatoes and they're quite expensive."
The young man was impressed by what he had heard. "Be such a potato," said the professor.