Cast pearls before swine.
1. 对牛弹琴。
习惯用语cast pearls before swine1.把珍珠丢在猪面前; 明珠暗投; 对牛弹琴He who would search for pearls must dive below.1.欲寻珍珠就要潜到水里; 不入虎穴, 焉得虎子。P-Harbor1.珍珠港(美国军港)2.(珍珠港事件式的)偷袭P-River1.珠江2.美国密西西比州中部的一条河流特殊用法glass pearls1.玻璃珠oriental pearl1.东方珍珠porcelain pearl1.瓷制珍珠