指导原则用英语怎么说？

指导原则

例句

• Armed with such a precept,a number of doctors may slip into deceptive practices. 有了这样一条指导原则,一些医生可能渐渐习惯于采取骗人的做法。
• Development has been guided by a concern for the ecology of the area. 该地区的发展以注重生态为指导原则。
• Development has been guided by a concern for the ecology of the area... 该地区的发展以注重生态为指导原则。
• Certain guidelines can be given. First, have a heating engineer check the safety of the system. 可以提供一些指导原则：第一，找位供暖工程师检查系统的安全性。
• We are aiming for guidelines, not cut-and-dried answers. 我们想要的是指导原则，不是固定的答案。