tithonia

例句：

1. 1. The iron tree is a symbol of strength and resilience.
   铁树象征着力量和韧性。
2. 2. The thorny tree was a challenge for the climbers.
   这棵荆棘树对攀岩者来说是一大挑战。
3. 3. The iron tree has been used in ceremonies to represent endurance and perseverance.
   铁树在仪式中被用来象征耐力和毅力。