白圭之玷

Explanation: A white spot on. Persons or things in general very good analogy, but some small drawbacks. 　　Usage: Partial official; as adverbial; describe the good or to the existence of small defects 　　Source: "Book of Daya suppression": "A flaw Baigui, they can still wear him; Andean mar words, not for the people." 　　Examples: Nothing but ~, not later section does not end. (Lu Xun "且介亭杂文 last series on Taiyanxiansheng Knew") Thesaurus:  Gold can't be pure and man can't be perfect., Gold can't be pure and man can't be perfect., have defects as well as merits, Yu do not cover flaws, Yuburongxia