established principle

• 准则； 既定原则

established principle的用法和样例：

例句

1. It will be against my principle to lie to you.
   对你说假话是违背我的行为准则的。
2. Fair pricing is a fundamental business principle.
   价格公道，是基本的商业准则。
3. He dealt with the problem on principle.
   他根据既定原则处理那问题。