transmission-line theory

例句：

1. 1. The transmission line theory has been widely applied in the field of power transmission and distribution.
   输电线路理论在电力传输和分配领域得到了广泛应用。
2. 2. The transmission line theory provides a theoretical basis for designing and constructing power grids.
   输电线路理论为设计和建设电网提供了理论依据。
3. 3. The transmission line theory is crucial for ensuring the safe operation of power systems.
   输电线路理论对于确保电力系统的安全运行至关重要。