types of systems

例句：

1. 1. The study of computer systems is an important area of research.
   计算机系统的学习是一个重要的研究领域。
2. 2. Different types of systems require different levels of maintenance.
   不同类型的系统需要不同的维护水平。
3. 3. The development of new technologies often involves the creation of new types of systems.
   新技术的开发往往涉及到新系统的创建。