indefatigability

例句：

1. 1.The athletes demonstrated indefatigability during the race.
   运动员在比赛中表现出了不可动摇的耐力。
2. 2. She possesses an indefatigable spirit that never fails to inspire her team.
   她拥有一种永不放弃的精神，总是能激励她的团队。
3. 3.Despite facing numerous challenges, she remained indefatigable in pursuing her goals.
   尽管面临许多挑战，她仍然坚持不懈地追求自己的目标。