you can't make a silk purse of a sow's ear

短语

释义与例句

prov.
  1. 1.

    It is not possible to produce something refined, admirable, or valuable from something which is unrefined, unpleasant, or of little or no value.

词源

From make a silk purse of a sow's ear, with the common perception of swine as unrefined, dirty, or base creatures.

来源：wiktionary