change-over system的用法和样例：
例句
- To popularize the European Credit Transfer System was an important action for constructing the common European higher education system.
实行欧洲学分转换系统是欧洲高等教育空间一体化建设的重要举措。 - The state-space model is one of the effective mathematical modelsto study the interaction between ocean waves and the wave energy conversion system.
状态空间模型是研究海洋波能转换系统相互作用的一种有效数学模型。
