To make pure; cleanse.

精炼；使纯净。

To free from coarseness or rudeness; educate or improve.

使高尚；使文雅。

Reading good books helps to refine one's speech.

读好书使谈吐文雅。

To become fine or pure; improve in quality.

变纯洁；改进品质。

To grow in delicacy.

变精美。

To employ fine distinctions, subtleties, or the like, in thought or language.

(思想或言语)力求精细。