谚语 you can't make a silk purse out of a sow'ear是什么意思还有 a hog in a silk waistcoat is still a hog.casting pearls before swine .

谚语 you can't make a silk purse out of a sow'ear是什么意思还有 a hog in a silk waistcoat is still a hog.casting pearls before swine .
谚语 you can't make a silk purse out of a sow'ear是什么意思
还有 a hog in a silk waistcoat is still a hog.
casting pearls before swine .

谚语 you can't make a silk purse out of a sow'ear是什么意思还有 a hog in a silk waistcoat is still a hog.casting pearls before swine .
第一句是狗嘴里吐不出象牙来,第二是猪学人样 只是徒劳 ,第三是对牛弹琴