滴水穿石

Explanation: Constantly dripping water can wear a stone downtown. Metaphor as long as perseverance, continuous efforts, it must succeed. 　　Usage: And language style; as predicate, adverbial; metaphor persevering 　　Source: Song Luo Da by "a penny cut Yulu Helin Officials": "One day the money, a thousand days Thousand money, wire sawing off, dropping water." 　　Examples: Students in their daily learning, there should be ~ spirit. Thesaurus:  Rome is not built in a day, Tiechu grinding