尺有所短

Explanation: Analogy of things has its weaknesses, not in all cases are suitable 　　Usage: The main predicate; as object, attribute; that things have weaknesses 　　Source: Southern Liang Zhongrong "Poetry" in the second volume: "Long Yuan Shi Zhang, and Sheng before, the word net United States and Britain, as Wu Yan to make, have a short little feet." 　　Examples: Metaphor and its naturally occurring '~' of the Department, any metaphor is just a bit of everything among the comparison. ★ Mu "Postscript" Thesaurus:  ruler Amount to brief An inch superintendent, Every thing has its strong and weak points as a foot is oft-times too short and inch too long, Inch a director