| 例句 |
fail-safeadjective not likely to failflowers have been traditionally regarded as the fail-safe gift for Valentine's Day can't-miss, certain, infallible, sure, surefire, unfailing dependable, reliabledeadly, unerring fallible doubtful, questionable, uncertain a measure taken to preclude loss or injurythere are so many fail-safes built into the system that a highly unlikely series of mistakes would have to be made before failure could occur caution, palladium, precaution, preventive, safeguard armor, cover, guard, protection, screen, shield, wall, ward in 1946 |