fault freedom的用法和样例：
例句
- So some effective steps must be taken to improve fault toleration of the systems.
因此，必须采用有效的故障容错方法以提高系统的容错性能。 - In this paper, federated filter theory is briefly introduced, four typical structures are introduced, and their characteristics of fault tolerance are analyzed.
论文首先介绍了联邦卡尔曼滤波理论，分析比较了不同结构的联邦滤波器的特点和容错性能。
