fundamental principle

Some theories related to particle scatterance and the structure as well as the fundamental principle of the facilities for testing laser signal from multiple angles have been introduced.

介绍了粒子散射相关理论以及激光粒子信号多角度检测装置构成与基本原理,并详细描述了对烟与干扰气胶粒子多角度散射特征进行采集、处理和分析过程。

It appears to me the worst instrument of arbitrary power, the most destructive of English liberty and the fundamental principles of law, that ever was found in an English lawbook.

在我看来，这是在一本英国法律档案里所能找到表明专制权最坏文件。