There have been two failures: The shuttle Challenger and seven astronauts were lost just after launch in January 1986 due to an O-ring seal leak in a solid rocket booster that led to an explosion.

有两次失败的教训：1986年1月刚刚发射过后，一个固体火箭助推器的O型圈密封泄漏导致的爆炸，使我们失去了挑战者号和7名宇航员。

youdao

There have been engine failures as a result of adding some of these aftermarket additives to motor oil.

有一些策动机损坏就是由于在机油中加入了市售的添加剂致使制的。

youdao

Republican leaders have been heading for the hills, there have been failures of memory and contradictions with the recollections of staff members.

NPR: Dividing the 'Moral Vote' After New Scandals

But there have been failures too.

ECONOMIST: Senegal

Yes, there have been failures.

FORBES: Is It Time to Give Obama Some Credit?