The termprincipal is used generically to refer to either a user or a group of users.
术语主体通常是指用户或用户组。
2
First of all, reconstruction must be implemented in a well-coordinated framework that has long-term sustainability as its guiding principal.
首先，必须在一个协调良好的框架内开展重建工作，这个框架将长期可持续性作为其指导原则。
3
The principal long-term victims of this struggle are the Kuchis. Their annual migrations face ever greater competition from the expansion of settled communities.