他主张按方程的次数来进行分类是正确的原则。
Seeking first to understand, or diagnosing before you prescribe, is a correct principle manifest in many areas of life.寻求先理解别人,或者是先诊断再开方,是人生许多领域正确的原则妙方。明智的大夫在开方之前先诊断。
This method has a clear train of thought and a correct principle, and it takes full use of flowing pressure testing data.本文方法思路清晰、原理正确,充分发挥了流压监测资料的作用。