6.cast pearls before swine明珠暗投;对牛弹琴
You do not value what should be valued, I see I was casting pearls before swine.你不珍视应该珍视的东西, 我看我是在对牛弹琴。
7.pearls of wisdom
(wise information)金玉良言, 连珠妙语(常为开玩笑的话)
Her advice includes perfectly true but rather fulsome pearls of wisdom.她的建议确实不乏真知灼见, 但有点过分恭维了。