action principle

• 作用原理

action principle的用法和样例：

例句

1. The principle of modern flame retardation systems for textiles is discussed.
   讨论了适用于纺织品的现代阻燃体系的作用原理。
2. The principle and effect of impact compaction, and its application in rockfill subgrade is introduced in this paper.
   并对冲击压实的作用原理，压实功效以及冲击压实在填石路基中的应用作了介绍。