refine例句

We shall have to refine on our methods of advertising.
我们得进一步改进做广告的方法.

The purpose of oil refinery is to refine crude petroleum.
炼油厂的主要工作是提炼原油.

Modern medical techniques refine on those of the past.
现代医疗技术比过去的医疗技术要优越.

• #refine