fail-safe
adj.（形容词）Capable of compensating automatically and safely for a failure, as of a mechanism or power source.故障自动保险的：当机械装置或电源出现故障时，能自动和安全提供保障的Acting to discontinue a military attack on the occurrence of any of a variety of predetermined conditions.能阻止军事攻击的：预定情况发生时能终止军事攻击行为的Guaranteed not to fail:万无一失的：例句：.There is no fail-safe mechanism guaranteed either to contain or to restore presidential authority.(Arthur M. Schlesinger, Jr.).没有一个万无一失的处理方法可以保证抑制或恢复总统的权力.(小阿瑟M.施莱辛格)
n.（名词）A fail-safe mechanism.自动保险装置v.intr.（不及物动词）fail-.safed,fail-.saf.ing,fail-.safes To compensate automatically for failure.自动抵消故障
