fail-safe

• 指系统或方案设计成在发生故障时仍能安全运行，或防止故障造成危害；也泛指稳妥可靠、万无一失。

Describes a system or plan designed to prevent failure or to operate safely even if a part fails.

1. Guaranteed not to failB2formal

   Designed or intended to be completely reliable and without risk of failure.

   故障安全

   • The engineers developed a fail-safe system for the nuclear reactor.
   • This plan is not fail-safe; we need a backup.
   • A fail-safe mechanism ensures the parachute opens automatically.

   同义词bulletproofcertaindependablefoolproofinfalliblereliablesure-fireunerring

   反义词fallibleriskyunreliableunsafe

2. Automatically compensating for failureB2formal

   Eliminating danger by automatically compensating for a failure or malfunction.

   故障安全

   • The aircraft has a fail-safe autopilot that engages if the pilot loses control.
   • Fail-safe brakes are designed to engage if the main system fails.
   • The software includes a fail-safe mode that prevents data loss.

• 一种设计或机制，在发生故障或失效时能自动恢复到安全状态或维持安全运行，防止造成危害。也指为应对可能出现的失败而预先准备的备用方案或保障措施。

1. Safety mechanismB2formaltechnical

   A mechanism or system designed to automatically return to a safe condition in the event of a failure or malfunction.

   故障安全

   • The aircraft's fail-safe ensures the landing gear deploys even if the main system fails.
   • Engineers installed a fail-safe to shut down the reactor in an emergency.
   • The software includes a fail-safe that prevents data loss during a crash.

   同义词backstopsafeguardsafety device