杯水车薪

Explanation: A car with a glass of water to save the straw on fire. Analogy forces too small to solve the problem. 　　Usage: Complex sentence; as predicate, object, clause; that force can not solve the problem of small 　　Source: Qin Meng Ke, "Mencius": "This year it as a benevolent, still a glass of water to save a car to pay of the fire." 　　Examples: A new debt did not move Haofen, in addition to bearing Xu Xiading thirty-two, the great ~ the like. (Ching Lee Green Park "Qiludeng" seventy-fourth back) Thesaurus:  drop a bucket into an empty well, be of no avail (=without avail), put a halter round one's neck, make a law only to fall foul of it oneself; be hoist with or by one’ s own petard; get caught in one’ s own trap, suicide, Moths Firefighting, go for very little, Coke boil lapidation, Eggs and stone fight, whoever plays with fire will perish by fire, Cannibalism undesirable consequence, dig one’ s own grave, bring blame on oneself, make self-criticism as one who draws a fire against oneself, art of writing a composition Self-harm, a drop in the bucket Antonym Group:  Fain hair, Highly effective, Chuikang See m, Soratani microphone, be immediately effective, Tatemi result, Effective