徒劳无益

Explanation: Futile, with no use. 　　Usage: Joint type; as predicate, object; containing derogatory 　　Source: Song Yuan Xie, "cutting into the government to keep arms Okabayashi Sapporo child": "Cardiff were addicted to base, lack of solid; and those who are too high, in vain." 　　Examples: Talk about work efficiency, ~ do not do it. 　　Riddle: Earth to do good teachers do Thesaurus:  a cup of water can't put out the fire on a carload of wood, 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