不足为虑

Explanation: Feet: worth; consider: worry. Not worth worrying about worry 　　Usage: Partial official; as predicate; containing derogatory 　　Source: Jin Chenshou "Three Kingdoms Wei Zhi Wei Zhen Biography": "and Hefei Chenggu, cause for concern." 　　Examples: Contractors know the West to teach something, then Wonu water Kou, ~, inability to cover the boat These types are also homes. ★ Ming Li Zhi, "A land thinking biblioclast Mountain"