a power outage的用法和样例：
- FYI, There was a power outage Friday -> Saturday.
- The ice storm caused a power outage.
- Due to a power outage, only one paramedic responded to the call.
- Idle time often results from a random event, such as a power outage.
- This device does not allow write caching to be disabled. A power outage or equipment failure might result in data loss or corruption.