Heat treating that becomes filled with "rules of thumb" and methods or beliefs without rigor, documentation or an understanding of the scientific principleson which they are founded.
热处理变成充斥着“经验法则”和不严谨的方法或信念，这些文件或理解应建立在科学基础上。
2
Such learning produced knowledge that was dependent on example, and developed better understanding to the principles in the text.
这种学习就产生了依赖于样例的知识，形成了对课文中的原理的更好的理解。
3
Strength - Offer solutions based on a sound understanding of both scientific principles and solid practical experience.