中学英语语法教学要遵循交际性与实践性原则、集中与分散相结合的原则、趣味性与通俗性原则。
English teaching in middle school should conform to three key principles such as communication and application, centralization and decentralization, amusement and popularity.
未来的商务楼、卫星城的建设中，要把分布式能源系统纳入规划设计中，使大城市供能系统逐步走上集中与分散相结合的合理布局。
For the construction of new commercial buildings and satellite towns, the city will be looking at energy systems that address problems of power supply, use and efficiency.
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