deteriorated insulator

例句：

1. 1. Theold insulator was replaced with anew one to prevent further deterioration.
   为了防止进一步劣化，更换了旧的绝缘体。
2. 2. The electrical system needs regular maintenanceto ensure the integrity of the deteriorated insulators.
   为了确保劣化绝缘体的完整性，电气系统需要定期维护。
3. 3. The engineer inspected the insulators and found that some had alreadydeteriorated beyond repair.
   工程师检查了绝缘体，发现有些已经劣化到无法修复的程度。