primary network的用法和樣例：
例句
- According to the rules, there should be people especially assigned in a power network to save electrical power.
按照規定，電力網應設有專責人員負責節電工作。 - Right now, I believe the best option available for the power network is superconducting cable, and government officials are beginning to realise this too.
我認為目前電力網建設的最佳選擇是超導電纜，政府官員也開始意識到了這一點。
