这幅画已经很完整了,再加东西就是画蛇添足。Zhè fú huà yǐjīng hěn wánzhěng le, zài jiā dōngxi jiù shì huà shé tiān zú.This painting is already complete; adding anything more would be gilding the lily.
他的发言本来很精彩,最后那段解释纯属画蛇添足。Tā de fāyán běnlái hěn jīngcǎi, zuìhòu nà duàn jiěshì chún shǔ huà shé tiān zú.His speech was excellent to begin with; that last explanation was pure overkill.
这条短信写得很清楚,你再打电话确认就画蛇添足了。Zhè tiáo duǎnxìn xiě de hěn qīngchu, nǐ zài dǎ diànhuà quèrèn jiù huà shé tiān zú le.This message is perfectly clear; phoning to confirm would be overdoing it.