fossil bone

例句：

1. 1. The team spentmonths searching for the lost fossil bone.
   团队花了数月时间寻找失落的化石骨。
2. 2. Fossils are fascinating becausethey reveal so much about our past.
   化石令人着迷，因为它们揭示了我们过去的种种。
3. 3. The discovery of a new species ofdinosaur has sparked excitementamong paleontologists.
   新种恐龙的发现激发了古生物学家们的兴奋。