fail-safe|fail-safes

这个电梯系统有故障保护机制，即使在停电时也能安全运行。

The elevator system has a ___fail-safe mechanism to operate safely even during a power outage.

核电站的设计包含多重安全措施，当系统检测到异常时会自动启动。

The nuclear power plant has multiple ___fail-safes that activate automatically when anomalies are detected.

电梯配备了故障保护系统，会在检测到异常时自动停止运行。

The elevator has a ___fail-safe system that automatically stops it when detecting abnormalities.