primary network的用法和样例：
例句
- According to the rules, there should be people especially assigned in a power network to save electrical power.
按照规定，电力网应设有专责人员负责节电工作。 - Right now, I believe the best option available for the power network is superconducting cable, and government officials are beginning to realise this too.
我认为目前电力网建设的最佳选择是超导电缆，政府官员也开始意识到了这一点。
