verb, particle, punctuation, noun · to practice, train, drill, or exercise to perfect a skill

他坚持每天练字，书法进步非常明显。

verb · to boil and scour raw silk to remove sericin and make it white and soft

这是将生丝练成熟丝的工艺。

noun · white silk fabric, often used in a literary context

月光洒在地上，像一匹白练。