有一种学问叫“买西瓜学”。老板对伙计说:“一出门,往西走,第一道桥那里,有个卖西瓜的,你给我买两斤西瓜。”伙计一出门,往西走,没有看见桥,也没有看见卖西瓜的,于是就空着手回来了。老板骂他:“混蛋,简直没有脑子”伙计说:“西边真的没有卖西瓜的,东边倒是有一个。”老板问他 There is a knowledge called “buy watermelon science.” The boss said to the folks, “Go out and go west. The first bridge there is a watermelon, and you buy two pounds of watermelon for me.” As soon as the man went out and west, he saw neither the bridge nor the sold Watermelon, so he came back empty. The boss scolded him: “jerk, simply no brains,” the man said: “The West really did not sell watermelon, but there is one in the east.” The boss asked him