What is the translation and enlightenment of northerners eating ling?

There was a man who was born in the north and didn't know water chestnut. He is an official in the south. He ate water chestnut at a party. (a man born in the north) even put water chestnut shells in his mouth to eat. Someone said to him, "You must shell water chestnut first."

In order to cover up his shortcomings, the man said, "I'm not ignorant." The reason why it is eaten with the shell is to clear away heat and detoxify. " The person who asked said, "Is there such a thing in the north?"

He replied, "There is no land behind the mountain ahead!" " "Water chestnut grows in the water, but (he) says it grows in the soil because he reluctantly takes what he doesn't know as knowing.

Revelation:

A person's real knowledge lies in knowing what he knows and what he doesn't know. If you don't know, you will make jokes and be laughed at. The knowledge in the world is endless, and everyone's learning ability is limited. Only by learning with an open mind can we gain true knowledge.

The life of irony lies in truth. This short story not only follows the truth of life in plot conception, but also lies in the fact that the practices and performances of Beijingers are extremely universal and representative in real life.