饮河鼹鼠

Explanation: Metaphor refers to the demand or from a very limited person. 　　Source: Phrase from the "Happy Excursion," Yan River rats to drink, but full of. "Ming Li Changqi" Jian Deng Yu Hua Cave Anthurium mind "ashamed to drink river Mole profit abdomen, just thick Lu Yuan Ju ashamed to enjoy." 　　Examples: Everyone in the river next to the human intellect, are but like a drink of the river Mole. ★ Mu, "Ji Tan lyrics"