cold backup

例句：

1. 1. The server has a cold backup to prevent data loss in case of power outages.
   服务器有冷备份，以防停电导致数据丢失。
2. 2. The company relies on a cold backup for its critical systems in case of natural disasters.
   该公司依赖冷备份来保护其关键系统，以防自然灾害。
3. 3. The engineer tested the cold backup system before the launch of the new software update.
   在软件更新发布前，工程师测试了冷备份系统。