principle

It is a basic principle of my life to always tell the truth, even when it is difficult.

(Chinese) 诚实守信是我人生的基本准则，即便在困难时刻也是如此。

The judge was known for following the principles of justice and fairness in every case.

(Chinese) 这位法官因在每个案件中都遵循公正公平的准则而闻名。

The airplane stays in the air by following the principles of aerodynamics.

(Chinese) 飞机靠遵循空气动力学原理停留在空中。

Understanding the basic principles of chemistry is necessary for this lab experiment.

(Chinese) 理解化学的基本原理是进行这个实验室实验所必需的。