及物动词提炼; 改善; 使高雅
及物动词
1. Reading good books helps to refine one's speech.
阅读好的书籍有助于一个人的言谈文雅。
2. Sugar, oil and metals are refined before use.
糖，油和金属在使用前须先提炼。
3. Crude oil can be refined into various petroleum products.
原油可炼制成各种石油产品。
4. Reading good books helps to refine our speech.
读一些好书有助于使我们的言谈更优雅。