cast pearls before swine
美 
英 
- na.明珠暗投;把珍贵物送给不识货的人
 - 网络对牛弹琴;把珍珠扔到猪面前;把珍珠丢到猪面前
 
un.  | 1. to offer something good or helpful to someone who does not value it  | 
| 单词 | cast pearls before swine | ||
| 释义 | cast pearls before swine美  英  
 
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